Two genes, m (apical meristem) and r (starburst rhizosomes), are linked on chromosome #5 in pea plants. Both genes are recessive to wild type and found to be 8 MU apart. If a wild type heterozygote is test- crossed, and produces 91 apical meristem plants and 8 apical, starburst plants from a total of 200 plants were produced, how many wild type plants will be produced? 4 12 O 16

Q: In a testcross for two genes, what types of gametes are produced with (a) complete linkage, (b)…

A: Testcross is a breeding of an individual with homozygous recessive individual. The aim is to…

Q: Assuming no crossover takes place, how many copies of the short-hair allele (h) will be present in…

A: Dominant allele Dominant allele is the factor (term use by Mendel, now it is known as gene) which…

Q: In the fruit fly, recessive mutations in either of two independently assorting genes, brown and…

A: In Drosophila, as well as in many other plants and animals, pigmentation is highly variable both…

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: In Primula vulgaris (primrose), purple flowers are dominant to white flowers, and short plants are…

A: Primula vulgaris (primrose) have two types of Traits :- A ) Traits for flower color :- In this ,…

Q: There are some members of the genus Datura that are trisomic for the chromosome set, which carries…

A: The cross between P+P+P X P+P is done in step 2

Q: A female of genotype a b c + + + produces 100 meiotic tetrads. Of these, 68 show no crossover…

A: A four-part structure that forms during the prophase of meiosis and consists of two homologous…

Q: The crossing of two orange-flowering plants results in 61 orange-flower progeny and 27 white-flower…

A: Introduction The passing on of traits from parents to their offspring is known as heredity, also…

Q: In Drosophila, the genes A, B, and C are linked and in the order given. The distances are A-B = 5…

A: Linked genes are genes that are located on the same chromosome. Unless they are separated by…

Q: ley, a self-fertilizing species that can be crossed fertilized, two true-breeding strains with…

A:

Q: nd seed (R) is dominant to wrinkled seed (r) and yellow seed (Y) is dominant to green (y), how many…

A: F1 generation:   Y Y y Yy Yy y Yy Yy The outcome is Yy green-yellow. where yellow seed (Y)…

Q: In tomatoes, dwarf (d) is recessive to tall (D), and opaque (light-green) leaves (op) are recessive…

A: The parents given are, D opd Op×D opd op The distance distance between the genes is given as 7 m.u.…

Q: In barley, a self-fertilizing species that can be cross-fertilized, two true-breeding strains with…

A: Cytoplasmic inheritance:Inheritance of genes those present in the organelles of the cytoplasm to the…

Q: The alleles his-5 and lys-1, found in yeast, result in cells that require histidine and lysine for…

A: a) In tetrad analysis, three types of tetrads are obtained:    Tetratypes= T = 363    Non-parental…

Q: In corn, the allele f ′ causes floury endosperm and the allele f ″ causes flinty endosperm. In the…

A: First, examine the crosses and also the ensuing genotypes of theendosperm:

Q: three recessive genes a, b, and c in the model plant Arabidopsis are found to be linked on…

A:

Q: In a cross between two varieties of corn, gl1gl1Ws3Ws3 (egg parent) * Gl1Gl1ws3ws3 (pollen parent),…

A: Fertilization is the process of fusion of male and female gametes that results in the formation of a…

Q: Thorn apples produce either purple (P) or white (p) flowers, and their fruits are either spiny (S)…

A: Purple (P) flowers = dominant White (p) flowers= recessive Spiny (S) = dominant Smooth (s)=…

Q: The following is a linkage map of chromosome 5 for three genes in tomato: Lf W Lf (normal) vs. If…

A: Crossing over is the process by which non-sister chromatids of homologous chromosomes share genetic…

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: Two pink-flowered four-o’clock plants were crossed to each other.What is the probability that a…

A: Incomplete dominance is a type of interaction in which both dominant and recessive alleles express…

Q: In the F2 generation of this cross, 224/300 embryos develop into wild-type flies, while 76/300 of…

A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…

Q: Fruit flies can have straight wings (S) or curly wings (s), and they can have be female XX or male…

A: S denoting for straight wings is a Dominant or wild type trait. And s denotes recessive trait for…

Q: Radishes may be round, oval and lomg. Aside from this, they may be red, purple or white in color.…

A: The Result of various crosses are:-

Q: In autotetraploid Chinese primrose (Primula sinensis L.), the gene controlling stigma color is very…

A: Autotetraploids are organisms that carry four copies of the same genome for example a homozygous…

Q: You self-fertilize an F1 plant to produce the F2 generation.  Based on Mendelian principles of…

A: GREGOR MENDEL was a mathematician, biologist and meteorologist who conducted several experiment on…

Q: Assume that two characters are controlled by genes we will generically label as A and B. In one…

A: Gene is defined as a segment or part of DNA that will occupy a particular place on a chromosome and…

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: In a dihybrid cross, a homozygous plant with purple and axial flowers (PPAA) is crossed with a…

A: This is the case of dihybrid cross because there are involved two traits. These are flower color and…

Q: The fly with vestigial wings is crossed with the fly with normal wings shown in the upper-right…

A: The length of wings in Drosophila is determined by the wing length gene. There are two distinct…

Q: Thorn apples produce either purple (P) or white (p) flowers, and their fruits are either spiny (S)…

A: A gene is a unit of hereditary present in thousands on the strands of DNA(deoxyribonucleic acid).…

Q: . In corn, the allele A allows the deposition of anthocyanin (blue) pigment in the kernels (seeds),…

A: The genes that can be inherited together and lies close to one another on the same chromosome are…

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: In Drosophila, ebony body colour is produced by a recessive gene a and wild-type (gray) body colour…

A: Answer: DIHYBRID CROSS : It is the cross made between two traits of an individual.

Q: In corn, two independent, recessive nuclear genes, japonica (j) and iojap (ij), produce variegation…

A: Japonica heterozygous gene- Jj Cross between Jj × Jj Gametes J j J JJ Jj j Jj jj The…

Q: In barley, a self-fertilizing species that can be crossed fertilized, two true-breeding strains with…

A: Option(B) is correct answer. Reciprocal cross is done where different parental types are used both…

Q: The order of the genes on a plant chromosome is A, B, C, where A and B are located 10 cM apart and B…

A: Genes A and B are located 10 cM apart and B and C are located 3cM apart. Hence, S.C.O for A and B =…

Q: This is a pedigree for a dominant trait caused by gene A in humans. Shaded symbols show individuals…

A: The trait is a dominant trait.  Thus, genotype of people having the trait - AA or Aa.  Genotype of…

Q: In the fruit fly Drosophila, a rudimentary wing called vestigial and the dark body color called…

A: This species is used because of its small size,short generation time and ability of females to lay a…

Q: In the Dorset sheep breed, both males and females have horns, and the trait is controlled by an…

A: According to our guideline we can answer only the first question. The alleles are the alternative…

Q: The long hair of Persian cats is recessive to the short hair of Siamese cats, but the black coat…

A: Alleles for the characterstics od hair and coat color in persian cat.   Long hair- ll Short hair- LL…

Q: barley, a self-fertilizing species that can be cross-fertilized, two true-breeding strains with…

A: Reciprocal cross is done where different parental types are used both as a maternal form and as a…

Q: The ABO blood type locus has been mapped on chromosome 9. A father with blood genotype BO blood and…

A: The presence or absence of the antigens A and B, which are borne on the surface of red blood cells,…

Q: Three genes in fruit flies affect a particular trait, and at least one dominant allele of each gene…

A: The genotype is the collection of genes in our DNA that are responsible for a specific trait. The…

Q: The three genes X, Y, and Z are linked on an autosomal chromosome in humans (X to Y is 15 cM, and Y…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: Nicotiana glutinosa (2n = 24) and N. tabacum (2n = 48) are two closely related plant species that…

A: There are two types of Nicotiana, in particular, namely Nicotiana glutinosa (2n = 24) and Nicotiana…

Q: The long hair of Persian cats is recessive to the short hair of Siamese cats, but the black coat…

A: Introduction  A gene is consisting of a pair of alleles/factors and can be dominant or recessive. A…

Q: In tomatoes, dwarf (d) is recessive to tall (D) and opaque (light-green) leaves (op) are recessive…

A: Linkage refers to the close co-location of genes or combinations of DNA on chromosomes to one…

Q: What would be the chromosome number of progeny resulting from the following crosses in wheat? What…

A: The complete chromosome sets present in the cells of an organism is referred to as ploidy. Humans…

Q: If two genes on the same chromosome exhibit complete linkage, what is the expected F2 phenotypic…

A: ANSWER;- Here each parent produces 2 types of gametes, a+b+, and ab, giving the simple Mendelian…

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.