Free Mendel's Laws of Inheritance MCQs with Answers
130 Mendel's Laws of Inheritance MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Mendelian inheritance explains how alleles separate into gametes and assort during reproduction, producing predictable genotype and phenotype ratios. Questions cover dominance, recessiveness, homozygous and heterozygous conditions, the laws of segregation and independent assortment, monohybrid and dihybrid crosses, test crosses and the limits caused by linked genes.
Last updated
130 questions · page 7 of 7
- A. Co-dominance
- B. Over dominance
- C. Epistasis
- D. Incomplete dominance
Explanation: In incomplete dominance, the heterozygous phenotype is a blend of the two homozygous phenotypes, resulting in a phenotypic ratio that…
Correct answer: Incomplete dominance- A. Test cross
- B. Interbreeding
- C. Epistasis
- D. Hybridization
Explanation: Hybridization is the process of an animal or plant breeding with an individual of another species or variety. So D is the correct option.
Correct answer: Hybridization- A. 50%
- B. 25%
- C. 75%
- D. 100%
Explanation: A cross between two heterozygous tall plants results in 25% homozygous tall, 50% heterozygous tall, and 25% dwarf plants.
Correct answer: 75%- A. Overdominance
- B. Complete dominance
- C. Incomplete dominance
- D. Co-dominance
Explanation: The correct answer is Overdominance. In the case of fluorescent pigments in the eyes of fruit flies, heterozygotes may exhibit a more…
Correct answer: Overdominance- A. New
- B. De novo
- C. Drift
- D. Both (a) & (b)
Explanation: The correct answer is De novo mutation. These mutations occur in the germ cells or immediately after fertilization and are not inherited…
Correct answer: De novo- A. Multiple alleles and incomplete dominance
- B. Co dominance and incomplete dominance
- C. Incomplete dominance only
- D. Multiple alleles and co dominance
Explanation: The human ABO blood group system exhibits codominance. It consists of three alleles A, B, and O. Both A and B show codominance
Correct answer: Multiple alleles and co dominance- A. Dominance
- B. Co dominance
- C. Multiple alleies
- D. Incomplete dominance
Explanation: Codominance means that no allele can block or mask the expression of the other allele.
Correct answer: Incomplete dominance- A. Complete dominance
- B. Over dominance
- C. Co-dominance
- D. Incomplete dominance
Explanation: When we talk about the dominance of relations in the 4 o'clock plant, it can be described in terms of incomplete dominance.
Correct answer: Incomplete dominance- A. Dihybrid
- B. Dual hybrid
- C. Heterotype
- D. Hybrid
Explanation: A hybrid is an organism that has parents of different breeds, varieties, or species.
Correct answer: Hybrid- A. 3:1 between son and daughter
- B. 1:3 between son and daughter
- C. 1:1 between son and daughter
- D. None of the above
Explanation: The chances for having a son or daughter in human birth are often estimated to be around 50% for each gender.
Correct answer: 1:1 between son and daughter