Q: Perform two consecutive crosses between these two plants, GGHH x gghh, question #11. as in
A: DIHYBRID CROSS It is a cross between two different genes that differ in two observed traits. A…
Q: Explain the X-Linkage in Drosophila ?
A: X-linkage is the sex linkage that involves X chromosome. X linkage is the genetic factor or gene…
Q: Occasionally, a mouse X chromosome is broken into two pieces and each piece becomes attached to a…
A: Introduction One Of Two Sex Chromosomes Is The X Chromosome. The X And Y Chromosomes Are Found In…
Q: Why is the gene for eye color in drosophila present on the X chromosome ?
A: Gene is the basic unit of heredity for all life forms. It is transferable from one generation to its…
Q: Explain how Bridges’s study of nondisjunction in Drosophila helped prove the chromosome theory of…
A: There are 23 pairs of chromosomes present in humans. Out of these 23 pairs 22 pairs are autosomal…
Q: The reason of X-linked inheritnce was first explained by----------while working on Drosophila.(A)…
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: Provide a proof that a different phenotype can be produced from the same genotype. What are the…
A: A phenotype is a set of observable characteristics about a person, such as height, eye colour, and…
Q: Explain why genes located on the same chromosome are said to be linked. Why do alleles of linked…
A: A gene is a unit of hereditary arranged in thousands on the strands of DNA(deoxyribonucleic acid)…
Q: Person A has a mutation in a chromosome in a liver cell, while person B has a mutation in a…
A: Mutation refers to sudden heritable change in the phenotype of an individual. In the molecular term,…
Q: Why is the development of individuals with Klinefelter's and Turner's syndromes relatively normal,…
A: This syndrome occur due to presence of an additional copy of X chromosomes resulting into karyotype…
Q: A human female with Turner syndrome (45,X) also expresses the X-linked trait hemophilia, as did her…
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: Mention four reasons why Drosophila was chosen by Morgan for his experiments in genetics.
A: T.H. Morgan selected drosophila or fruit fly for it genetic experiment. He gave chromosomal theory…
Q: With regard to development, what would the dire consequences beif polycomb group complexes did not…
A: Polycomb-group proteins basically refer to the proteins possessing the ability to remodel…
Q: A cytogeneticist is studying the cells from an abnormal female monkey. In some cells, she finds that…
A: When a mammal embryo is developing, one of the chromosomes in each pair will randomly become…
Q: Predict the potential effect of the Lyon hypothesis on the retina of a human female heterozygous for…
A: LYON'S HYPOTHESIS -- The hypothesis , named after Mary Lyon stated it , suggesting that doseage…
Q: Determine the correspondence of the gene X and gene Y to the mutant gene causing Trp-phenotype
A: An organism's genotype is influenced by its genome as well as by its environment. The physical…
Q: What is a Barr body? How is its structure different from that ofother chromosomes in the cell? How…
A: Chromosomes are the carrier of genetic material deoxyribonucleic acid (DNA). They are coiled in…
Q: describe the Idiogram of the human X chromosome
A: Chromosomes are the form of genetic material and they are coiled structures composed of DNA and…
Q: Are queen and worker bees genetically different from each other?
A: Genetically different refers to the difference in the composition of the genetic material of the…
Q: This pedigree exhibits a maternal effect. What is the genotype of each individual?
A: Pedigree analysis is useful when identifyig any population when progeny data from several…
Q: Why is drosophila aconvenient animal for thestudy of linked genes?
A: Genetics is the branch of biology, which deals with the study of genes, their pattern of…
Q: Discuss the types of experimental observations that Mary Lyonbrought together in proposing her…
A: A sex chromosome also termed as allosomes are involved in the determination of sex in individuals.…
Q: Nullisomy is a genome mutation where a pair of homologous chromosomes that would normally be present…
A: Chromosomes are long thread-like structures that carry coded genetic information in the form of DNA.…
Q: A cytogeneticist is studying the cells from an abnormal female monkey. In some cells, she finds that…
A: reason for bar body formation The reason for this is that, in each somatic cell of a normal female,…
Q: CdLS is usually caused by new mutation in oneparent’s gamete. Why?
A: The changes in the sequence of nucleotides are called mutations. The agents that cause mutations are…
Q: Describe when X-chromosome inactivation occurs and how thisleads to phenotypic results at the…
A: Chromosomes are the carrier of genetic material deoxyribonucleic acid (DNA). They are coiled in…
Q: determining coat color is the agouti gene?
A: The coloration, pattern, and length of the cat fur is governed by numerous genes and is determined…
Q: Explain how human cells compensate for the X-linkedgene dosage difference in XX and XY nuclei.
A: A sex chromosome is a chromosome that differs from an ordinary autosome in form, size, and behavior.…
Q: In dihybrid crossing, are the two genes that code for the two separate phenotypes on the same…
A: Inheritance or heredity is passing-on one trait from the parents to the progeny by either asexual or…
Q: Which is a FALSE statement about X inactivation in mammalian females? O Females that are…
A: X-chromosome inactivation is the transcriptional silencing of one X chromosome in female mammalian…
Q: When expressing X-linked recessive gene notation, how should the notation be written. Should I use…
A: X-linked recessive inheritance is a type of inheritance in which a mutation in a gene on the X…
Q: Assume that the Holliday junctions resolve so that there is no crossing over (that is, there is no…
A: For the maternal chromosome and paternal chromosome see below.
Q: Which findings support the fact that the presence of the Y- chromosome rather than the lack of a…
A: In many animals including humans, sex is determined by sex chromosomes, which are X and Y…
Q: Comparing the colchicine-treated cell and the untreated cell, what general type of chromosomal…
A: Colchicine is a microtubule destabilizing drug and is used for the treatment of rheumatoid…
Q: Occasionally, a mouse X chromosome is broken into two pieces and each piece becomes attached to a…
A: The X chromosome is one of the two sex chromosomes in mammals, along with the Y chromosome. The X…
Q: Cat breeders are aware that kittens expressing the X-linked calico coat pattern and tortoiseshell…
A: Gene is the unit of heredity that is transferable from the parent to the offsprings. The function of…
Q: A cytogeneticist is studying the cells from an abnormal female monkey. In some cells, she finds that…
A: In species with XY sex-determination, a Barr body or X-chromatin is an inactive X chromosome in a…
Q: Down syndrome individuals carry an extra chromosome _________ in their cells.
A: Genes are the units (physical and functional) of heredity, made up of DNA or deoxyribonucleic. They…
Q: x-linked
A: When one copy of X Chromosome is inactive and silence its expression is said to be x linked…
Q: what are Lethal effects of homozygosity for a deletion
A: Lethality is associated with the deletion. Deletion is a type of chromosomal rearrangement that…
Q: Can the Lyon hypothesis be tested in a human female who is homozygousfor one allele of the X-linked…
A: Lyon hypothesis: The concept that a gene dosage imbalance between males and females is compensated…
Q: Explain how polytene chromosomes of Drosophila are produced and how they form a six-armed structure?
A: Polytene chromosomes are large chromosomes that have thousands of DNA strands. They provide a high…
Q: Why does the sex chromosome X carry the gene for eye color in Drosophila?
A: The mode of inheritance is a pattern of obtaining parentral alleles or genes to the offsprings. The…
Q: Explain why the distance between two genes alonga chromosomeis associated whether they are linked or…
A: Humans have 23 chromosomes. Within it, there are nearly 19000 genes. The term Genetic linkage can…
Q: Fruit flies (Drosophila) were mated. Cross #1 - 2 male red eyes (se+), wild wings(ap+) X 4 female…
A: Introduction: Dihybrid cross is referred to as crossing between two individuals who differ only in…
How three-point crosses verify Sturtevant’s map of the Drosophila X chromosome.
Step by step
Solved in 2 steps
- Cat fur coat color genetics is interesting. Orange fur is dominant (''B'') to black fur (''b'') and piebald, which is white spotting, is dominant (''S'') to non-white-spotted (''s''). Both of those genes are located on the X chromosome. In addition, in cats, somatic cells exhibit X-inactivation randomly, which explains why there are tortoiseshell cats (when heterozygous, have orange and black spots) as well as calico cats (orange and black but also with white spots). An orange and white spotted male is mated with a tortoiseshell female. Draw a dihybrid Punnet square to show the possible offspring:Cat fur coat color genetics is interesting. Orange fur is dominant (''B'') to black fur (''b'') and piebald, which is white spotting, is dominant (''S'') to non-white-spotted (''s''). Both of those genes are located on the X chromosome. In addition, in cats, somatic cells exhibit X-inactivation randomly, which explains why there are tortoiseshell cats (when heterozygous, have orange and black spots) as well as calico cats (orange and black but also with white spots). An orange and white spotted male is mated with a tortoiseshell female. State the genotype of the male and the female.Females of wild-type Strain A and males of mutant Strain B, as well as females of mutant Strain B and males of wild-type Strain A, make reciprocal crosses. Explain why reciprocal crosses are needed in genetics experiments involving Drosophila fruit flies.
- Explain why it was essential that Mendel perform his crosses using a large sample size?Describe the molecular process of X-chromosome inactivation.This description should include the three phases of inactivationand the role of the Xic. Explain what happens to the X chromosomes during embryogenesis, in adult somatic cells, and duringoogenesis.Hi! I would love to get some help on the box-and arrow model question! :) A male individual who is XYSRY has the following genotype for the AMH gene on chromosome 19: AMH1 AMH2. The AMH1 allele codes for a protein that is capable of binding to the receptor for AMH. The AMH2 allele codes for a protein that is unable to bind with the receptor for AMH. Based on your understanding of biology, what is the likely phenotype of this individual? Humans have 23 pairs of chromosomes of which 22 pairs are autosomal and the 23rd pair is sex-linked.In a human female, the sex chromosome pair is represented as XX, whereas, in a human male, it is represented as XY.AMH is an anti-Mullerin hormone produced by the Sertoli cells in males and helps in the development of the sex organs. Each pair of chromosomes has a pair of genes called alleles at the same loci representing a single character. Each gene of an allele represents the expression of the character.A gene can either show expression or…
- Discuss the types of experimental observations that Mary Lyonbrought together in proposing her hypothesis concerning X-chromosome inactivation. In your own words, explain how these observations were consistent with her hypothesis.In Drosophila, a heterozygous female for the X-linkedrecessive traits a, b, and c was crossed to a male that phenotypically expressed a, b, and c. The offspring occurred inthe following phenotypic ratios.+ b c 460a + + 450a b c 32+ + + 38a + c 11+ b + 9 No other phenotypes were observed.(a) Determine the correct sequence and construct amap of these genes on the X chromosome ?A cytogeneticist is studying the cells from an abnormal female monkey. In some cells, she finds that both X-chromosomes are active (i.e. not packaged into a Barr body), although one of the X-chromosomes appears shorter. She also finds that one of the autosomes are packaged as a Barr body, and she suspects that a translocation event might have been involved. By referring to the mechanism of X-chromosome inactivation, explain the observations made by the scientist
- In Drosophila, a heterozygous female for the X-linkedrecessive traits a, b, and c was crossed to a male that phenotypically expressed a, b, and c. The offspring occurred inthe following phenotypic ratios.+ b c 460a + + 450a b c 32+ + + 38a + c 11+ b + 9 No other phenotypes were observed.(a) What progeny phenotypes are missing? Why?In Drosophila, a heterozygous female for the X-linkedrecessive traits a, b, and c was crossed to a male that phenotypically expressed a, b, and c. The offspring occurred inthe following phenotypic ratios.+ b c 460a + + 450a b c 32+ + + 38a + c 11+ b + 9 No other phenotypes were observed.(a) What is the genotypic arrangement of the alleles ofthese genes on the X chromosome of the female?Considering the following chromosome which is represented as a series of genes on each arm separated by the centromere. Describe the type of mutation required to produce each of the mutant chromosomes below. ABCDEFG*HIJKLMN