9. In fruit flies, the gene for tan body color (T) is completely dominant over the gene for ebony body color (t). The gene for red eyes is dominant over the gene for white eyes and is a sex-linked trait. A tan female with red eyes (heterozygous for both traits) is crossed with a homozygous ebony male with white eyes. A) Write out the genotypes of two parents. Remember that eye color is sex- linked! Female: Male: B) Set up and fill out a punnett square for this cross. C) What is the probability of producing a fly that is an ebony male with white eyes?

9. In fruit flies, the gene for tan body color (T) is completely dominant over the gene for ebony body color (t). The gene for red eyes is dominant over the gene for white eyes and is a sex-linked trait. A tan female with red eyes (heterozygous for both traits) is crossed with a homozygous ebony male with white eyes. A) Write out the genotypes of two parents. Remember that eye color is sex- linked! Female: Male: B) Set up and fill out a punnett square for this cross. C) What is the probability of producing a fly that is an ebony male with white eyes?

Name: 9. In fruit flies, the gene for tan body color (T) is completely domi
Uploaded: 2024-03-20T06:43:04.000Z
Channel: Bartleby
Description: 9. In fruit flies, the gene for tan body color (T) is completely dominant over the gene for ebony body color (t).The gene for red eyes is dominant over the gene for white eyes and is a sex-linked trait. A tan female with redeyes (heterozygous for bo

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter13: Genes, Chromosomes, And Human Genetics

Section: Chapter Questions

Problem 7TYK: In Drosophila, two genes, one for body color and one for eye color, are carried on the same...

See similar textbooks

Similar questions

Imagine you are performing a cross involving seed color in garden pea plants. What Fi offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green. 100 percent yellow-green seeds 100 percent yellow seeds 50 percent yellow, 50 percent green seeds 25 percent green, 75 percent yellow seeds
The following pedigree shows the pattern of inheritance of red green color blindness in a family. Females are shown as circles and males as squares; the squares or circles of individuals affected by the trait are filled in red. What is the chance that a son of the third-generation female indicated by the arrow will be color-blind if the father is a normal man? If the father is color-blind?
In cats, the genotype AA produces tabby fur color; Aa is also a tabby, and aa is black. Another gene at a different locus is epistatic to the gene for fur color. When present in its dominant W form (WW or Ww), this gene blocks the formation of fur color and all the offspring are white; ww individuals develop normal fur color. What fur colors, and in what proportions, would you expect from the cross AaWw Aa Ww?
1) By convention, the recessive trait will determine the abbreviation used to track crosses if it is a mutant condition, since it stands out in contrast to the rest of the population. For example, if pea pods are typically green in color, a mutant condition might result in yellow pea pods; therefore, the lowercase letter ‘y’ would be used to depict the mutant state, yellow, while uppercase ‘Y’ would depict the wildtype (wt) condition, green. Remember that the mutant condition is not necessarily always recessive. 1 A) . If green is dominant wt (Y) and yellow is a recessive mutant condition (y), depict a Yy father mated with a YY mother in the Punnett. 1B) Considering the dominant allele, what colors are the parents in the cross above? Yy = _____________________ YY = _____________________ 1C) What colors are the offspring in the cross above? 1D) What is the phenotypic ratio of the offspring? 1E) What is the genotypic ratio of the offspring? (Remember, the genotypic ratio is based…
2.In dogs, there is a hereditary deafness caused by a recessive allele, d. A kennel owner has a male dog that she wants to use for breeding purposes if possible. The dog can hear, but the owner is unsure of the genotype. She does a testcross (crosses it to a homozygous recessive dog), and two of the five offspring are deaf. This means that the male dog A.has the genotype DD B.has the genotype Dd C.is still of unknown genotype since there were offspring of both deaf and hearing phenotypes. D.has the genotype dd
13. A dominant x-linked allele (B) gives normal color vision but the recessive allele (b) causes red-green color blindness.A. What is the genotype of a man with normal color vision whose father was color- blind? B. What is the genotype of a woman with normal color vision whose father was color-blind? C. If a woman who is colorblind marries a man with normal vision, what would you expect for the genotypes and phenotypes of their children? D. If a man is color-blind, which parent did he inherit the gene from? Explain your answer. E. Which parent does a man get all his x-linked genes from? F. If a woman is color-blind, what do you know about the genotypes and phenotypes of her parents? G. Are men more likely than women to get a genetic disease which is x-linked and dominant? Are they more likely to get a disease that is x-linked and recessive? Explain your answers. H. Can a man with normal color vision have a colorblind daughter? Explain your answer.…
4. Marfan syndrome is a genetic trait caused by in a dominant allele. The trait causes a weakening of the aorta that can be fatal. A teenager whose mother has the syndrome (but whose maternal grandfather was not affected), and whose father was unaffected, is concerend that she may have the trait. a. What is the phenotype of each of her parents? Genotype? b. What is the chance that the teenager has Marfan syndrome?
1. An albino man whose parents are both normal marries a woman one whose parents is normal and the other albino. She has an albino sister. The couple has a normal son. a. Is albinism a dominant or a recessive trait? Explain your answer. b.Give genotypes of all the persons involved. c. The couple plans to have more kids. What is the probability of their second child being normal?
1- In garden peas, yellow (Y) seed color is dominant to green (y). Because yellow and green are two different forms of the same gene (seed color), they are alleles. Use a Punnett square to show a cross between two heterozygous pea plants. What are the phenotype(s) of the offspring? What are the genotype(s) of the offspring? 2- In garden peas, yellow (Y) seed color is dominant to green (y). Because yellow and green are two different forms of the same gene (seed color), they are alleles. Use a Punnett square to show a cross between two heterozygous pea plants. What are the phenotype(s) of the offspring? What are the genotype(s) of the offspring? Use the information below to answer questions 3-6 There may be a number of possible alleles for a given gene within a population. In a multiple allele system the dominance relationships between the various alleles must be considered. One of the more familiar examples of a multiple allelic system is that of the human ABO blood group. The gene…
In Drosophila, two genes, one for body color and one for eye color, are carried on the same chromosome. The wild-type gray body color is dominant to black body color, and wild-type red eyes are dominant to purple eyes. You make a cross between a fly with gray body and red eyes and a fly with black body and purple eyes. Among the offspring, about half have gray bodies and red eyes and half have black bodies and purple eyes. A small percentage have: (a) black bodies and red eyes; or (b) gray bodies and purple eyes. What alleles are carried together on the chromosomes in each of the flies used in the cross? What alleles are carried together on the chromosomes of the F1 flies with black bodies and red eyes, and those with gray bodies and purple eyes?
Another gene in Drosophila determines wing length. The dominant wild-type allele of this gene produces long wings; a recessive allele produces vestigial (short) wings. A female that is true- breeding for red eyes and long wings is mated with a male that has purple eyes and vestigial wings. F1 females are then crossed with purple-eyed, vestigial-winged males. From this second cross, a total of 600 offspring are obtained with the following combinations of traits: 252 with red eyes and long wings 276 with purple eyes and vestigial wings 42 with red eyes and vestigial wings 30 with purple eyes and long wings Are the genes linked, unlinked, or sex-linked? If they are linked, how many map units separate them on the chromosome?
The dominant C allele of a gene that controls color in corn produces kernels with color; plants homozygous for a recessive c allele of this gene have colorless or white kernels. What kinds of gametes, and in what proportions, would be produced by the plants in the following crosses? What seed color, and in what proportions, would be expected in the offspring of the crosses? a. CCCc b. Cccc c. CcCc