Question

Which of the following statements is/are correct?a. Genes are thread-like structures in the nucleus of a cell formed of DNA, which carries the chromosomes.b. The dominant gene decides the appearance of an organism even in the presence of an alternative gene.c. The recessive gene decides the appearance of a person in the absence of the dominant gene.

• (A) Only a
• (B) Only b
• (C) Only c
• (D) Both b and c

Answer 1

The Correct Option is B

Explanation:
In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.The simplest situation of dominant and recessive alleles is if one allele makes a broken protein. When this happens, the working protein is usually dominant. The broken protein doesn't do anything, so the working protein wins out.Hence, the correct option is (B).