AP BIOLOGY

HEREDITY

MONOHYBRID CROSS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A green pea plant (GG) is being crossed with a green pea plant (Gg). What is the phenotype ratio of the offspring?
A
100 % rainbow
B
50% yellow and 50% green
C
100% green
D
100% yellow
Explanation: 

Detailed explanation-1: -The cross between a green pea plant (Gg) and a yellow pea plant (gg) is shown below: From the cross, we can see that the possible genotypes are green and yellow. 50% of the offspring will have a Gg phenotype and 50% will have gg phenotype.

Detailed explanation-2: -The physical expression of a genotype that can be visually observed is known as a Phenotype. a pea plant has a yellow pod phenotype, its genotype may either be GG or Gg. phenotype (green pods), then the individual parent having the dominant phenotype must be heterozygous.

Detailed explanation-3: -The phenotype, or observable trait of this pea, is therefore green. In total, there are three different genotypes possible for the pod color characteristic. Here’s the one we’ve just discussed. The pea could be homozygous for the dominant green pod trait. Homozygous means they have two alleles that are the same.

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