QUESTION 17 Consider the trait seed color for pea plants. Dominant allele is yel

Question

QUESTION 17 Consider the trait seed color for pea plants. Dominant allele is yellow (A) and recessive allele is green (a). What is the genotype of the unknown parent that is crossed with an individual that is homozygous recessive for seed color when the offpspring are 1/2 yellow and 1/2 green. O B. Cannot determine O C aa-Homozygous recessive OD.AA- Homozygous dominart QUESTION 18 The phenomenon in which a particular phenotype is expressed with a different degree of severity in different individuals in known as [1]. For example, the degree of severity of emphysema due to a deficiency in the alpha 1 anti trypsin enzyme that causes a loss of lkung elasticity QUESTION 19 Describe the three ways Mendel departed from other plant hybridizers of the time (1860s) in designing his experiments Click Save and Submit to save and submit. Click Save All Answers to save all answers.

Explanation / Answer

17. According to question the unkown parent is crossed with recessive parent (aa) and we get 1/2 yellow and 1/2 green. Which is possible if we get gametes with both recessive and dominant trait i.e. A and a; which is possible only if the unknown parent is heterozygous.

Heterozygous parent : Aa

gametes from heterozygous parent : A and a

Homozygous recessive parent :aa

gametes from homozygous recessive parent : a

Cross: A x a= Aa (Yellow)

a x a = aa(green)

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