Genetics Crosses: Punnett Squares, Genotypes, and Phenotypes, Study Guides, Projects, Research of Genetics

Download Genetics Crosses: Punnett Squares, Genotypes, and Phenotypes and more Study Guides, Projects, Research Genetics in PDF only on Docsity! Cross Practice Problems Show Punnett square and give Genotype and Phenotypes for each cross In humans, brown eyes are dominant over blue eyes. What type of offspring would you expect if you crossed a heterozygous brown eyed person with a heterozygous brown eyed person? In pea plants, purple flowers are dominant to white flowers. What parental genotypes would produce offspring that are all heterozygous for the purple trait? If out of 100 offspring, 74 are purple flowered and 26 are white, what were the probably genotypes and phenotypes of the parents? Two short-haired guinea pigs are mated several times. Out of 100 offspring, 50 of them have long hair (recessive). What are the probable genotypes of the parents? Two pea plants are heterozygous for both seed shape (round is dominant) and seed color (yellow is dominant). What are the possible genotypes and phenotypes for these two traits when these plants are crossed? About 70% of Americans perceive a bitter taste from the chemical phenylthiocarbamide (PTC). The ability to taste PTC results from a dominant allele. Albinism is also a single locus trait with normal pigmentation being dominant. A normally pigmented woman who cannot taste PTC has a father who is an albino taster. She marries a homozygous, normally pigmented man who is a taster, but who has a mother that does not taste PTC. What are the genotypes and phenotypes of the possible children?