Question

Pea plant height is controlled by one gene with two alleles: tall (t) and short (t). Tall is dominant and short recessive. Use a punnet square to determine the possible offspring that could result when a heterogeneous tall plant is crossed with a homologous short plant. What is the probability that the offspring will be tall or short

Answer 1

Answer:

The correct answer is -

phenotype : 50% tall and 50% short

genotype: 50% (Tt) heterogenous tall and 50% (tt) short.

Explanation:

In this given case, it is given that in a pea plant the trait of height has two alleles T for tall that is dominant over t the short which is recessive and if there is cross between heterozygous tall and true-breeding receeive then-

Cross: Tt with tt

gametes: T, t and t, t.

Punnett square:

     T     t

t    Tt     tt

t     Tt    tt

Here two out of four are tall and two out of four are short in height,

Thus,

phenotype : 50% tall and 50% short

genotype: 50% (Tt) heterogenous tall and 50% (tt) short.