A man heterozygous at both the locus for PTC tasting and at the locus for albinism marries an albino woman heterozygous at the PTC tasting locus. These two loci assort independently. What is the probability of producing a family of six with three tasters with normal pigmentation, two nontaster albinos, and one taster albino? Formula is fine , DO NOT calculate final value
Q: In Brinjal eggplants, purple fruit is incompletely dominant to white fruit, with the heterozygote…
A: When a white flowering plant is about to make a cross with a purple flowering plant, the resultant…
Q: Red-green colorblindness is determined in humans by a single X-linked locus. Colorblind males are…
A: XBY male has normal vision.XbY male has Red-green color blindness.XBXB females are normal…
Q: Perform two consecutive crosses similar to those of Mendel for the following individual plants.…
A: Plants with round seeds (RR) and plants with wrinkled seeds (WR) are crossed (rr). Both parents are…
Q: f the G locus were 50 or more map units from the centromere, what types and proportions of gametes…
A: Recombination in terms of genetics describe the process that explain the exchange of genetic…
Q: We think that dwarfism in river birch might be inherited as a single-locus, simple Mendelain trait.…
A: Inheritance or heredity is passing on one trait from the parents to the progeny by either asexual or…
Q: The ability to detect the bitter taste of Phenylthiocarbamide (PTC) is inherited. “Tasting” is…
A: Genes control the character of organisms. The alternate form of a gene is called alleles. Alleles…
Q: Mouse fur color is affected by TWO unlinked loci. GG or Gg mice are agouti. Mice with genotype gg…
A: The phenomenon by which the expression of one gene expression is modified by another gene. The…
Q: .In Drosophila, gray body color is dominant over ebony body color, while long wings are dominant…
A: answer given below Dominant Traits…
Q: phenotype of a cat
A: Phenotype : A phenotype is an individual's observable traits.
Q: The following pedigree illustrates the inheritance of ringed hair, a condition in which each hair is…
A: The condition in which a single dominant allele is responsible for causing the disease then the…
Q: Leaf coloration in the four-o'clock plant, Mirabilis jalapa, was one of the first examples of…
A: In plant cells the nuclear genes are present within the nucleus as chromatin fibres within the…
Q: Draw a preliminary linkage map of the three loci. What is their order? (E.g. is the forked locus…
A: A genetic map is a linkage map of a species or experimental population that shows the position of…
Q: An ear of corn has a total of 381 grains, including 216 Purple & Smooth, 79 Purple & Shrunken, 65…
A: Answer: DIHYBRID CROSS = It is a cross between two traits of a same species reproducing progeny at…
Q: dominance effect of alleles at the R locus. a) How many different gametes are possible in the…
A: Trihybrid cross The cross involve 3 pairs of contrasting traits of three characters is called…
Q: In humans, free ear lobes (E) is dominant over attached ear lobes (e), and brown eyes (B) is…
A: The answer is given below.
Q: In pea plants, the "L" allele, which indicates smooth seeds, is dominant over the "l" allele, which…
A: Independent assortment is random distribution of alleles to the gametes that occurs when genes are…
Q: Phenotypically wild-type female Drosophila, whose mothers had spineless bristles (ss) and fathers…
A: The percentages of chromosomal crossover events that take place between various alleles are…
Q: In mice, albinism (g) is recessive to grey coat colour (G). A grey mouse mated with an albino mouse.…
A: Answer:- Dihybrid cross:- G (Grey coat color) g (albino coat color) G (Grey coat color) GG…
Q: The production of purple pigment in a certain species of flower is dependent upon two gene loci. You…
A: A dominant trait is expressed in both homozygous and heterozygous genotypes.
Q: 1 II 1 2 a) Assume that colour is controlled by a single sex-influenced gene where green is…
A: a- In second generation female (1) would be red . b- due to cytoplasmic inheritance both would be of…
Q: n Drosophila, gray body color is dominant over ebony body color, while long wings are dominant over…
A: answer is given below...
Q: What is the result of crossing a black male cat (Nn) and a black female cat (Nn)
A: If a black male cat having allele Nn is crossed with with female cat having allele Nn Suppose N…
Q: In Humans, the ability to taste PTC is inherited as a dominant gene (T). In a marriage between 2…
A: ANSWER;- 1) To determine the probability of 3 taster children, first, determine the probability of…
Q: In Drosophila, gray body color is dominant to ebony body color, while long wings are dominant to…
A: Genotype is defined as the complete set of genes present in the individual and the information of…
Q: Seed color is controlled by 3 independently assorting bi-allelic genes (P, Q, R), such that…
A: The correct answer to this question: option d. 4:1
Q: Dihybrid Cross In garden pea plants, tall plant height (T) is dominant to dwarf plant height (t) and…
A: Given: In garden pea plants, Tall plant height - Dominant - T Dwarf plant height - recessive - t…
Q: a. Among the progeny of a self-fertilized semisterilecorn plant heterozygous for a reciprocal…
A: Reciprocal translocation is the event when parts of non-homologous chromosomes are exchanged. This…
Q: We think that dwarfism in river birch might be inherited as a single-locus, simple Mendelain trait.…
A: Mendel's law of segregation is first law which determines that when a cross is made between two pure…
Q: A pea plant with the genotype RrYYPpIiaa is crossed with a second pea plant with genotype RRyyPPiiAa…
A: The genotype is defined as the set or collection of genes present in an individual inherited by the…
Q: E. W. Lindstrom crossed two corn plants with green seedlings and obtained the following progeny:…
A: Epistasis refers to the interaction between the two genes.
Q: Three fruit shapes are recognized in the summer squash (Cucurbita pepo): disk-shaped, elongated, and…
A: Genes are the hereditary units of life. The inheritance pattern was introduced by Gregor Mendel,…
Q: Assuming two independently assorting gene loci for eye color and wing length in Drosophila…
A: A dihybrid cross is a type of cross in which two traits are involved . As per the question , two…
Q: In griffins, coat colour is determined by a single gene with a completely dominant black (B) allele…
A: The phenotype and genotype of offsprings depend on the gene that they inherit from their parents.
Q: What are the possible phenotypes of the offspring of a short (recessive) pea plant with axial…
A: Mendel pea plants have seven different contrasting traits that make them suitable to be used to…
Q: Given the following testcross data for corn in which the genes for fine stripe (f), bronze aleurone…
A: Formulas for three point test cross - A. Distance between two genes = (#progenies obtained by SCO…
Q: Theoretically, what is the expected result from the parental cross of a grey mouse and an albino…
A: Dominant trait is grey coat( G) Recessive trait is albinism (g) The cross is between grey mouse and…
Q: In a cross in Drosophila, a female heterozygous for the autosomallylinked genes a, b, c, d, and e…
A: Homozygous refers to the genotype of an organism with two identical alleles at a locus. Heterozygous…
Q: For which of the individuals mentioned can you be sure of the genotypes? What genotypes are possible…
A: According to Mendel, every trait or character is governed by a gene. A gene has two allelic forms, a…
Q: Kernel color in wheat is controlled by 2 pairs of genes (AABB). Determine the color of the offspring…
A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…
Q: In onions, presence of gene C causes production of an enzyme which catalyzes the production of…
A: "Inheritance" is the process through which a child gets genetic information from his or her parents.…
Q: Perform two consecutive crosses similar to those of Mendel for the following individual plants.…
A: Monohybrid is a cross involving single pair of contrasting traits of a character. F1 generation is…
Q: If a two-point testcross of heterozygous females and homozygous-recessive males in Drosophila…
A: Testcross is defined as the cross between an individual (with unknown genotype) with another…
Q: In dogs, dark coat color is dominant over albino, andshort hair is dominant over long hair. Assume…
A: Hereditary qualities is the study of genes and heredity of how certain characteristics or attributes…
Q: Which of the following statements is true about the molecular basis of Mendel's second law? The…
A: Mendel on working on the pea plants proposed 3 mendelian laws, the traits or genes which inherit by…
Q: DIHYBRID CROSS: In rabbits, assume that spotted skin (G) is dominant over non-spotted skin (g) and…
A: Dihybrid cross is a breeding experiment between two organisms which are identical hybrids for two…
Q: A pure breeding strain of squash that produced disk-shaped fruits was crossed with a pure- breeding…
A: A dihybrid cross is a method in which the phenotypes of two genes are tracked by mating organisms…
Q: Consider these two crosses and assume that independent segregation is exhibited by all gene pairs.…
A: Introduction The Punnett square is a square diagram that is used to predict the genotypes of a…
Q: At the molecular level (with regard to loss-of-function alleles), explain why the ttvv homozygote…
A: In heterozygotes, the single wild-type dominant allele may be able to provide enough normal gene…
Q: In sweet peas, the synthesis of purple anthocyanin pigment in the petals is controlled by two genes,…
A: Introduction: Flower color in sweet pea is under the control of two genes B and D. These are…
Q: Assume the height in a particular plant is determined by two pairs of unlinked polygenes, each…
A: In polygenic traits, also called quantitative traits, the expression of specific traits is…
Step by step
Solved in 2 steps
- A large ear of corn has a total of 433 grains, including 271 purple & smooth, 73 purple & shrunken, 63yellow & smooth, & 26 yellow & shrunken. Conduct a X^2 analysis to determine if this ear of corn was produced by adihybrid cross (PpRr x PpRr) resulting in a phenotypic ratio of 9:3:3:1.Neurospora of genotype a + c are crossed withNeurospora of genotype + b +. (Here, + is shorthandfor the wild-type allele.) The following tetrads areobtained (note that the genotype of the four sporepairs in an ascus are listed, rather than listing alleight spores):a + c a b c + + c + b c a b + a + ca + c a b c a + c a b c a b + a b c+ b + + + + + b + + + + + + c + + ++ b + + + + a b + a + + + + c + b +137 141 26 25 2 3a. In how many cells has meiosis occurred to yieldthese data?b. Give the best genetic map to explain these results.Indicate all relevant genetic distances, both betweengenes and between each gene and the centromere.c. Diagram a meiosis that could give rise to oneof the three tetrads in the class at the far right inthe listAt the molecular level (with regard to loss-of-function alleles), explain why the ttvv homozygote has an ovate seed capsule.
- The gene controlling ABO blood type and the gene underlying nail-patella syndrome are said to show linkage. What does that mean in terms of their relative locations in the genome? What does it mean in terms of how the two traits are inherited with respect to each other?Given the karyotype shown at right, is this a male or a female? Normal or abnormal? What would the phenotype of this individual be?a. If an individual who is homozygous for the mutation found in individual 2 and heterozygous for the mutation found in individual 4 marries an individual who is homozygous for the mutation found in individual 4 and heterozygous for the mutation found in individual 2, what will be the phenotype of their children? b. List the intermediate that would build up in each of the types of children who could not produce protein E.
- n corn, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the male part of the corn plants (i.e the tassel) unable to produce fertile pollen; the female parts, however, remain receptive to pollination by pollen from male fertile corn plants. However, the presence of a nuclear fertility restorer gene F restores fertility to male sterile lines sing the cardboard chips, simulate the crosses indicated below. Give the genotypes and phenotypes of the offsprings in each cross, and properly label the nucleus and the cytoplasm of each individual in the cross Legend male sterile cytoplasm Male fertile cytoplasm FF nucleus Ff nucleus ff nucleus A. Male sterile female x FF male Explain the phenotype of the offspring B. Male sterile female x Ff male Explain the phenotype of the offspringWhen many families were tested for the ability to tastethe chemical phenylthiocarbamide, the matings weregrouped into three types and the progeny were totaled,with the results shown below:ChildrenNumber NonParents of families Tasters tastersTaster × taster 425 929 130Taster × nontaster 289 483 278Nontaster × nontaster 86 5 218With the assumption that PTC tasting is dominant (P)and nontasting is recessive (p), how can the progenyratios in each of the three types of mating be accountedfor?Multiple crosses were made between true-breeding lines of black and yellow Labrador retrievers. All the F1 progeny were yellow. When these progeny were intercrossed, they produced an F2 consisting of 121 yellow, 9 black and 30 chocolate. What epistatic ratio and what kind of epistasis is approximated in the F2? Propose a biochemical pathway for coat color in Labrador retrievers based on the type of epistasis. Correlate each genotype with the phenotype that would occur in your pathway. Also show the frequency of each genotype. A-B- A-bb aaB- aabb
- Mendelian ratios are modified in crosses involving autotetraploids.Assume that one plant expresses the dominant trait greenseeds and is homozygous (WWWW). This plant is crossed to onewith white seeds that is also homozygous (wwww). If only onedominant allele is sufficient to produce green seeds, predict theF1 and F2 results of such a cross. Assume that synapsis betweenchromosome pairs is random during meiosis.In rice, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the male part of rice plants (i.e. the stamen) unable to produce fertile pollen; the female parts, however, remain receptive to pollination by pollen from male fertile rice plants. However, the presence of a nuclear fertility restorer gene F restores fertility to male-sterile lines. Give the result(s) of the cross and explain the phenotype of the offspring.In radishes, color and shape are each controlled by asingle locus with two incompletely dominant alleles.Color may be red (RR), purple (Rr), or white (rr) andshape can be long (LL), oval (Ll), or round (ll). Whatphenotypic classes and proportions would you expectamong the offspring of a cross between two plantsheterozygous at both loci?