Free Inheritance MCQs with Answers
1,238 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.
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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Read the Inheritance notesFree MDCAT chapter notes with key terms1,238 questions · page 62 of 62
- 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- A. 0%
- B. 50%
- C. 75%
- D. 100%
Explanation: If the father is hemophilic (has the disease) and the mother is a carrier, the chances of the baby inheriting the disease will be 50%.
Correct answer: 50%- A. 0%
- B. 50%
- C. 75%
- D. 100%
Explanation: If the father has hemophilia and the mother is a carrier, there is a 50% chance that the baby will inherit the disease.
Correct answer: 50%- A. X - chromosome
- B. XX - chromosomes
- C. YY - chromosomes
- D. XY - chromosomes
Explanation: The correct answer is that a single ovum of a human being contains an X chromosome.
Correct answer: X - chromosome- A. Male
- B. Female
- C. Both male and female
- D. None of them
Explanation: Color blindness is an X-linked recessive trait, meaning it is carried on the X chromosome.
Correct answer: Female- A. X linked recessive
- B. X linked dominant
- C. Dominant autosomes
- D. Y linked inheritance
Explanation: Haemophilia is an X-linked recessive disorder, which means it is more commonly seen in males than females.
Correct answer: X linked recessive- A. Baldness
- B. Albinism
- C. None of these
- D. Myopia
Explanation: Males with higher testosterone levels have a dominant baldness gene, whereas females with lower testosterone levels have a recessive…
Correct answer: Baldness- A. WZ-ZZ type
- B. XY - XX
- C. X0 - XX
- D. Compound Sex
Explanation: In Drosophila, the sex determination is based on the presence of sex chromosomes.
Correct answer: XY - XX- A. XX
- B. XY
- C. XO
- D. X
Explanation: In butterflies, females typically have a ZW sex-determination system, where females are ZW and males are ZZ.
Correct answer: XY- A. Alports syndrome
- B. Coffin-Lowry syndrome
- C. Hemophilia
- D. Thalassemia
Explanation: Option C is correct.Hemophilia is a condition that renders the individual less able to form blood clots.
Correct answer: Hemophilia