2. A heterozygous black pig is mated with a homozygous black pig. (a) What are the genotypes of the parents? Bb (b) Work the problem showing the possible genotypes and phenotypes of the offspring and the probabilities of each. Genotypes Phenotypes BB BB b Bb Bb 3. A black pig is mated to a white pig. In the F1 generation there are 5 black and 5 white pigs. Give the genotypes of the parents.
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- 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?Two pairs of traits are segregating in a cross. Two parents produce 156 progeny that fall into 4 phenotypes. The numbers of offspring in the 4 phenotypes are 89, 31, 28, and 8. What are the genotypes of the two parents?1. A woman who is heterozygous for the brown eye and blue eye alleles marries a man with blue eyes. What are the genotypes and phenotypes of the children? a) What is the genotypic ratio of the above cross (Write number next to genotype)? ___________________________________________________________________ b) What is the phenotypic ratio of the above cross? (Write number next to phenotype)? ___________________________________________________________________
- 1. A man with O blood type marries a woman with AB blood type. What are the expected genotypic and phenotypic ratios for the children? a) What is the genotypic ratio of the above cross (Write number next to genotype)? ___________________________________________________________________ b) What is the phenotypic ratio of the above cross? (Write number next to phenotype)? ___________________________________________________________________2. You cross a pure-breeding red guinea pig with short hair and a pure-breeding white guinea pig with long hair. Allof the offspring are long hair and cream colored.a. What type of inheritance is hair length? Hair color? How do you know?b. What are the genotypes of the parents?c. Determine the genotypes and phenotypes and how many are expected for the F2 generation. (Just leaveyour answers as a list with numbers beside them. No ratios required.)1. How many different types of gametes can be produced by an individual with the genotype Yy Ww Pp ee Bb? 2. If an individual with the genotype Yy Ww Pp ee Bb is crossed with another individual with the same genotype, what proportion of offspring will be homozygous recessive at all genes? 3. If an individual with genotype Yy Ww Pp ee Bb is crossed with an individual with the same genotype, what proportion of offspring will have the dominant phenotype for the four heterozygous loci?
- 1) Imagine you discover a new mutant strain of tailless mice. Upon looking closer, you notice that I is only the females who are tailless. In paired matings with tailless females crossed with normalmales, you find that the progeny are always recovered in the following ratios: 1/3 tailless females, 1/3 normal females, 1/3 normal males. a)What is the most likely genotype of the tailless mice? b) Provide a simple explanation for the ratio: 1/3 tailless females, 1/3 normal females, 1/3 normal males.1. An albino man whose parents are both normal marries a woman one of 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 the 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. Most of the individuals of a certain wildflower population have white flowers, although a few are purple-flowered. Crosses have demonstrated that allele for white color flower (W) is dominant over the allele for purple (w). a. Give the genotype of a purple-flowered plant, and show the gametes that it would produce as a result of meiosis. b. If two heterozygous whoite-flowered plants are crossed. What fraction of the offspring do you expect to be purple? c. If two purple-flowered plants are crossed, what fraction of their offspring do you expect to be white? 2. In one study, Gregor Mendel crossed yellow-seeded, tall garden pea with a green-seeded, short garden pea. The F1 offspring were all yellow-seeded and tall. Assuming independent assortment of these two genes, what phenotypes and proportions did he fin among F2 offspring when the F1 garden peas are allowed to fertilize themselves? 3. Thorn apples produce either purple (P) or white (p) flowers, and their fruits are either…