Question

question 8
12 points
what is the expected genotypic ratio for your nickel penny cross? pp enter answer : pp
enter answer : pp enter answer

question 9
12 points
what was the expected phenotypic ratio? purple enter answer : white enter answer

Explanation:

Step1: Assume a cross

Assume a cross between two heterozygous individuals (Pp x Pp).

Step2: Use Punnett - square analysis

The possible gametes from each parent are P and p. The Punnett - square has 4 possible combinations: PP, Pp, Pp, pp.

Step3: Calculate genotypic ratio

There is 1 PP, 2 Pp, and 1 pp. So the genotypic ratio is 1:2:1.

Step4: Determine phenotypic ratio

Since P is dominant over p, both PP and Pp show the dominant phenotype (purple). Only pp shows the recessive phenotype (white). So the phenotypic ratio is 3 (purple) : 1 (white).

Answer:

Question 8:
PP: 1
Pp: 2
pp: 1
Question 9:
Purple: 3
White: 1