AP BIOLOGY

CELL DIVISION

MEIOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
GgTt x GgTtWhat would the phenotypic ratio be for the cross above?
A
8:8
B
9:3:3:1
C
4:4:4:4
D
1:2:1
Explanation: 

Detailed explanation-1: -This 9:3:3:1 phenotypic ratio is the classic Mendelian ratio for a dihybrid cross in which the alleles of two different genes assort independently into gametes.

Detailed explanation-2: -A dihybrid cross results in a roughly 9:3:3:1 ratio of offspring phenotypes.

Detailed explanation-3: -The F2 generation always produced a 3:1 ratio where the dominant trait is present three times as often as the recessive trait. Mendel coined two terms to describe the relationship of the two phenotypes based on the F1 and F2 phenotypes.

Detailed explanation-4: -So, the correct answer is ‘Monohybrid cross’.

There is 1 question to complete.