What is the probabilty of two tall peas plants, heterzygous for the tall ellele, producing a short pea plant.?
A. 75%
B. 50%
C. 25%
D. 0%
Is the answer c?
Right.
To determine the probability of two tall pea plants, heterozygous for the tall allele, producing a short pea plant, we need to understand the principles of Mendelian genetics.
The tall allele (T) is dominant over the short allele (t). Therefore, a homozygous tall plant would have the genotype TT, while a heterozygous tall plant would have the genotype Tt.
Given that both plants are heterozygous (Tt) for the tall allele, we can represent their potential gametes as T and t. When these gametes combine during fertilization, there are four possible combinations: TT, Tt, tT, and tt.
Only the genotype tt represents a short plant, so we need to determine the number of tt genotypes out of the four possible combinations.
The probability of a specific genotype occurring can be calculated using the Punnett square. In this case, to determine the probability of producing a short plant, we need to consider the chance of getting the tt genotype.
From the Punnett square, we can see that there is a 25% chance of getting the tt genotype (one out of four combinations). Therefore, the correct answer is C. The probability of two tall pea plants, heterozygous for the tall allele, producing a short pea plant is 25%.