Question

The allele for long tail feathers (T) shows dominance over the allele for short tail feathers (t) in pheasants. In a cross between pure line long tail pheasants (TT) and a pure line short tailed (tt) pheasant, the percentage of offsprings that produces pheasants with short tails would be
A. $25\%$
B. $50\%$
C. $75\%$
D. $0\%$
E. Insufficient information

Answer 1

The process by which a child inherits genetic information from a parent is known as inheritance. The entire process of heredity is dependent on inheritance, which is why the offspring look like their parents. This simply indicates that individuals of the same family share comparable qualities as a result of heredity.

Complete explanation:
Option A: if we continue the cross and self-pollinate the $F1$ generation, then we will get both long and short tail feathers in the ratio $3:1$ i.e., $25\%$ will be the short tail feathers.
So, option A is not correct.
Option B: Long tail feathers (T) are dominant over short tail feathers (t) according to the question, hence crossing pure breeding long tail (TT) and short tail (tt) pheasants will result in all heterozygous dominant progeny (Tt). As a result, all pheasants will have long tail feathers, and there will be no progeny with short tail feathers.
So, option B is also not correct.
Option C: If we continue to cross and self-pollinate the F1 generation, we will receive both long and short tail feathers in a $3:1$ ratio, with the short tail feathers accounting for $25\%$ of the total.
So, option C is not correct.
Option D: According to the question, long tail feathers (T) are dominant over short tail feathers (t), hence crossing pure breeding long tail (TT) and short tail (tt) pheasants will result in all heterozygous dominant progeny (Tt). As a result, all pheasants will have long tail feathers, and the percentage of offspring with short tails will be zero percent.
So, option D is correct.
Option E: the question has all the required information needed.
So, option E is not the correct option.

Hence, Option D is the correct answer.

Note:
After seven years of experimentation on pea plants, Gregor Mendel postulated the law of inheritance.
The dominance, segregation, and independent assortment laws are among Mendel's inheritance rules.
According to the law of segregation, each individual has two alleles, and only one allele is passed down to the offspring.
According to the law of independent assortment, the inheritance of one pair of genes is unrelated to the inheritance of another pair.