Question

Which one of the following can be explained on the basis of Mendel’s Law of Dominance?
A. Out of one pair of factors one is dominant and the other is recessive.
B. Alleles do not show any expression and both the characters appear as such in F₂ generation.
C. Factors occur in pairs in normal diploid plants.
D. The discrete unit controlling a particular character is called factor.
E. The expression of only one of the parental characters is found in a monohybrid cross.
Choose the correct answer from the options given below:

• A. A, B and C only
• B. A, C, D and E only
• C. B, C and D only
• D. A, B, C, D and E

Answer 1

The Correct Option is B

Mendel’s Law of Dominance states that in a pair of factors, one factor is dominant over the other, meaning it will express its character while the other remains hidden in heterozygous conditions.

Step 1: Statement A refers to the Law of Dominance. One allele (dominant) masks the expression of the other allele (recessive).

Step 2: Statement C is correct because factors (alleles) occur in pairs in normal diploid organisms, as explained by Mendel’s first law.

Step 3: Statement D is also correct because the factor that controls a particular character is known as a gene (or factor).

Step 4: Statement E is correct because in a monohybrid cross, only the dominant character is expressed in the F₁ generation, and recessive traits only appear in the F₂ generation if both alleles are recessive.

Thus, the correct answer is (2) A, C, D, and E only.