Genetics183EXERCISE #4."Genetic Problems"99Cases of Complete Dominance1. Gregor Mendel grew different varieties of pea plants in his garden.When he crossed yellow-seed plants with green-seed plants, he alwaysgot yellow pea seeds.a. What is the dominant allele?b. What is the genotype of all green-seed plants?Use the Punnett Square to show Mendel's cross.d. Do the parent yellow-seed plants have the same genotype asthe offspring yellow-seed pea plant?Parent:Offspring:What genetic fact do you know about any yellow-seed pea plant?е.f. If yellow-seed pea plants are dominant to green-seed peaplants, why are there mostly green pea seeds in nature?2. A dark-eyed man mates with a light-eyed woman and they have tendark-eyed children.a. What is the dominant allele?b. What is the genotype of all light-eyed people?What are the genotypes of the two parents?andd. What is the genotype difference between the dark-eyed parentand the dark-eyed offspring?Parent:Offspring:e. When two heterozygous dark-eyed people (Dd) are crossed,what is the phenotype ratio of dark-eyed offspring to light-eyedoffspring? (Use the Punnett Square to get your answer.)A Special Note on Eye ColorEye color is probably due to multiple alleles and more than one genepair. The numerous phenotypes are determined by genes that control boththe amount and the distribution of a dark pigment called melanin. Exceptfor albinos, everyone has some eye pigmentation.Eye color is determined mainly by the location of melanin in the irisof the eye. Concentrated melanin particles appear as brown; dilutemelanin particles appear as yellow or yellow-brown.

Name: Genetics183EXERCISE #4."Genetic Problems"99Cases of Complete Dominanc
Uploaded: 2024-03-20T06:43:04.000Z
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Description: Genetics183EXERCISE #4."Genetic Problems"99Cases of Complete Dominance1. Gregor Mendel grew different varieties of pea plants in his garden.When he crossed yellow-seed plants with green-seed plants, he alwaysgot yellow pea seeds.a. What is the domin