A pea plant is heterozygous for height (Tt). Which allele will be carried by a pollen grain produced by the plant?
A. T only
B. t only
C. T and t
D. T or t
Answer (3)
Answer:
The correct answer would be option D. T or t .
It can be explained with the help of the law of segregation .
This law states that alleles for each gene are randomly segregated into the gametes such that each gamete carries only a single copy of each allele.
Hence, if a parent cell contains T and t alleles so, T and t will randomly segregate into pollen grains (gametes).
It will result in the formation of two types of pollen grains or gametes each having an equal chance of inheriting T as well as t.
So, we can say that pollen grain produced by the plant (Tt) can carry either T or t in it.
It depends on the dominancy of the genes. If T is dominant, then the plant will grow taller and if t is dominant, then the plant will grow as dwarf. So, I think the correct option is C. T or t.
The pollen grain produced by a heterozygous pea plant (Tt) can carry either the T or the t allele, according to the Law of Segregation. Therefore, the correct answer is option D: T or t.
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