Question

in pea plants, the allele for tall plants (t) is dominant to the allele for short plants (t). if two heterozygous tall plants (tt) are crossed, what percentage of their offspring are expected to be short?

Explanation:

Step1: Set up Punnett Square

Parent alleles: Tt × Tt

	T	t
t	Tt	tt

Step2: Identify short genotype

Short plants need homozygous recessive (tt), only 1 out of 4 genotypes.

Step3: Calculate percentage

$\frac{1}{4} \times 100\% = 25\%$

Answer:

25%