You are studying 2 traits, fur color and length, in rabbits. You cross a true-breeding brown, short furred rabbit with a true-breeding white, long furred rabbit. The F1 offspring are all white, short furred rabbits. You then cross an F1 offspring to a rabbit homozygous recessive for both traits. Assuming that fur color and fur length are independently assorting, what phenotypic ratio would you expect to see in the F2 generation? white, short: white, long: brown, short: brown, long

You are studying 2 traits, fur color and length, in rabbits. You cross a true-breeding brown, short furred rabbit with a true-breeding white, long furred rabbit. The F1 offspring are all white, short furred rabbits. You then cross an F1 offspring to a rabbit homozygous recessive for both traits. Assuming that fur color and fur length are independently assorting, what phenotypic ratio would you expect to see in the F2 generation? white, short: white, long: brown, short: brown, long

Name: You are studying 2 traits, fur color and length, in rabbits. You cros
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Description: You are studying 2 traits, fur color and length, in rabbits. You cross a true-breeding brown, shortfurred rabbit with a true-breeding white, long furred rabbit. The F1 offspring are all white, shortfurred rabbits. You then cross an F1 offspring to a

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter8: Patterns Of Inheritance

Section: Chapter Questions

Problem 5RQ: Imagine that you are performing a cross involving seed texture in garden pea plants. You cross...

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Hemophilia and color blindness are both recessive conditions caused by genes on the X chromosome. To calculate the recombination frequency between the two genes, you draw a large number of pedigrees that include grandfathers with both hemophilia and color blindness, their daughters (who presumably have one chromosome with two normal alleles and one chromosome with two mutant alleles), and the daughters sons. Analyzing all the pedigrees together shows that 25 grandsons have both color blindness and hemophilia, 24 have neither of the traits, 1 has color blindness only, and 1 has hemophilia only. How many centimorgans (map units) separate the hemophilia locus from the locus for color blindness?
Imagine that you are performing a cross involving seed texture in garden pea plants. You cross true-breeding round and wrinkled parents to obtain F1 offspring. Which of the following experimental results in terms of numbers of plants are closest to what you expect in the F2 progeny? a. 8lOroundseeds b. 8lOwrinkledseeds c. 405:395 round seeds:wrinkled seeds d. 610:190 round seeds:wrinkled seeds
Figure 8.10 In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are dominant to green (y). What are the possible genotypes and phenotypes for a cross between PpYY and ppYy pea plants? How many squares would you need to complete a Punnett square analysis of this cross?
n rats, black fur color is dominant to white fur color, and pointy ears are dominant to round ears. You cross a homozygous black, pointy eared rat to a homozygous white, round eared rat. You then Cross one of the F1 offspring to a homozygous white, round eared rat, and obtain the following progeny: 88 black, pointy eared rats; 92 white, round eared rats; 76 black, round eared rats; 81 white, pointy eared rats. Please perform a chi-square test of independence to determine if the genes for fur color and ear shape are linked, or assort independently.
In rabbits, black hair is due to a dominant allele B and brown hair to its recessive allele b. Short hair (H) is dominant to long hair (h). Show punnet squares In a cross between a homozygous black, longhaired rabbit and a brown, homozygous shorthaired one, what would the F1 generation look like? If you did not know the genotype of an F1 rabbit, you could determine its genotype by a test cross in which it is crossed with an animal with which phenotype AND genotype? If you carried out this test cross (from 2, using the F1 from 1), what phenotypes and in what ratio would you expect? What phenotypes in what ratio would be expected in the F2 generation of the cross in point 1?
In rabbits, black hair is due to a dominant allele B and brown hair to its recessive allele b. Short hair (H) is dominant to long hair (h). In a cross between a homozygous black, longhaired rabbit and a brown, homozygous shorthaired one, what would the F1 generation look like? If you did not know the genotype of an F1 rabbit, you could determine its genotype by a test cross in which it is crossed with an animal with which phenotype AND genotype If you carried out this test cross, what phenotypes and in what ratio would you expect? What phenotypes in what ratio would be expected in the F2 generation?
In rabbits, black hair depends on a dominant allele, B, and brown hair on a recessive allele, b. short hair is due to a dominant allele, S, and long hair to a recessive allele, s. If a true-breeding black short-haired male is mated with a brown long-haired female, describe their offspring. What will be the genotypes of the offspring? If two of these f1 rabbits are mated, what phenotypes would you expect among their offspring? In what proportions?
You breed a black homozygous mouse with a white homozygous mouse and all the F1 offspring are gray. Then you breed 2 gray mice from the F1 generation together. What are the expected phenotypic percentages of the F2 generation?
A genetic engineer is going to cross two watermelon plants to produce seeds for a spring planting. He is breeding for size, and wants to have as many watermelons with the phenotype for long shape as possible. In watermelons, the allele for short shape (R) is dominant to the allele for long shape (r). Would crossing a watermelon homozygous recessive for the trait with a watermelon heterozygous for the trait give the most long watermelons possible? Explain your answer using Punnett Squares.
In rats, black fur color is dominant to white fur color, and pointy ears are dominant to round ears. You cross a homozygous black, pointy eared rat to a homozygous white, round eared rat. You then Cross one of the F1 offspring to a homozygous white, round eared rat, and obtain the following progeny: 88 black, pointy eared rats; 92 white, round eared rats; 76 black, round eared rats; 81 white, pointy eared rats. Perform a chi-square test of independence to determine if the genes for fur color and ear shape are linked, or assort independently. Show all of your work.
If a heterozygous F1 Tobacco plant was crossed to an albino plant, what is the expected number of green and white plants in the next generation? (show Punnett square) A woman homozygous dominant for albinism marries a man who is homozygous recessive for albinism. What are the possible genotypes and phenotypes percentages for their offspring? A man that can roll his tongue is heterozygous for the trait marries a woman that cannot roll her tongue. They have a child. The rolling tongue is dominant to not rolling tongue. What is the man’s genotype for tongue rolling? The women? Show the Punnett square for the child’s genotype Give the probability (percent chance) that the child can or cannot roll their tongue. Oh no! The F1 and F2 generation seed packet labels were mixed around. How would we know which seeds we planted by observing the color of the leaves? (Hint: What are the genotypes of the two generations? What color leaves do they produce in what ratios?)
Given a cross between these two parents: BbCcDDEEFfGgHhjj x BbCcddEeFfGgHHjj where traits B, E, H, J exhibit Mendelian inheritance; C, and F exhibit incomplete dominance; D, and G exhibit co-dominance answer the following: What proportion of the offspring will phenotypically resemble the first parent? What proportion of the offspring will genotypically resemble the second parent? How many phenotypes can be expected from the cross?