Question

QUESTION 1:

Identify the parentals from the following testcross results:

1. 117 green pods, normal leaves
2. 78 green pods, curling leaves
3. 115 yellow pods, curling leaves
4. 80 yellow pods, normal leaves

		b and d
		only a
		c and d
		a and b
		only d
		a and c

QUESTION 2:

In meiotic nondisjunction, meiotic products can be n+1, n-1, or n depending on when nondisjunction occurs. If non disjunction occurs in Meiosis I, what is the outcome?

		two trisomic and two monosomic products
		one trisomic and three monosomic products
		one trisomic, one monosomic, and two normal products
		All of the other choices are correct

Answer 1

Ans.1. a & c are the parentals of the test cross.

Ans.2.one trisomic,one monosomic and 2 normal products will form