The two versions of a trait (character), which are brought in by the male and female gametes are situated on____________
A
Copies of the same chromosome
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B
Two different chromosomes
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C
Sex chromosomes
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D
Any chromosome
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Solution
The correct option is A Copies of the same chromosome
In a sexually reproducing population, the genes are present in different forms or alleles.
The different alleles are present on different copies of the same chromosomes. In a normally diploid sexually reproducing population like humans, each individual has 23 pairs of chromosomes.
Thus, there are two copies of each chromosome.
One of the chromosomes (of each pair) comes from the father through male gamete and the other chromosome (of each pair) comes from mother through the female gamete. After the process of fertilization, the zygote is produced having 23 pairs of chromosomes, with alleles for a trait present on the homologous pair.
So, the correct answer is 'Copies of the same chromosome'