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 20 of 62
- A. Pleiotropy
- B. Dominance
- C. Probability
- D. Epistasis
Explanation: Epistasis is a circumstance where the expression of one gene is modified (e.g., masked, inhibited or suppressed) by the expression of one…
Correct answer: Epistasis- A. Pleiotropy
- B. Dominance
- C. Probability
- D. Epistasis
Explanation: There are many examples of epistasis. One of the first to be described in humans is the Bombay phenotype , involving the ABO blood group…
Correct answer: Epistasis- A. 0 %
- B. 25%
- C. 50%
- D. 100%
Explanation: Since the mother is color blind and has a genotype of XcXc, the father is normal having genotype XCY.
Correct answer: 50%- A. 2 gene pairs
- B. 3 gene pairs
- C. 4 gene pairs
- D. 6 gene pairs
Explanation: Three different gene pairs, i.e. Aa, Bb, and Cc at three different loci contribute to the wheat grain color.
Correct answer: 3 gene pairs- A. Quantitative trait
- B. Qualitative trait
- C. Pleiotropic trait
- D. Epistatic trait
Explanation: A quantitative trait is one that can be measured numerically, such as height.
Correct answer: Quantitative trait- A. Crossing over
- B. Recombination
- C. Linkage
- D. Epistasis
Explanation: Linkage. Linkages, simply put, are the close location of genes or other DNA markers to each other on chromosomes.
Correct answer: Linkage- A. Prophase I
- B. Prophase II
- C. Anaphase I
- D. Anaphase II
Explanation: Exchange of segments between non sister chromatids of homologous chromosomes is called crossing over.
Correct answer: Prophase I- A. Linkage
- B. Crossing over
- C. Chiasma
- D. Synapsis
Explanation: The pairing of homologous chromosomes that occurs in the prophase of the first meiotic division and during which crossing-over may occur.
Correct answer: Synapsis- A. Linkage
- B. Crossing over
- C. Synapsis
- D. Evolution
Explanation: Genetic variation provides the raw material for evolutionary change.
Correct answer: Evolution- A. Distance between genes
- B. Age of female
- C. Radiations
- D. All of them
Explanation: lt is well known that frequency of crossing over in various organisms can be markedly influenced by such factors as age, genotype, and…
Correct answer: All of them- A. Autosomes
- B. Sex chromosomes
- C. Pseudoautosome
- D. Monosomes
Explanation: A sex chromosome is a type of chromosome involved in sex determination.
Correct answer: Sex chromosomes- A. Autosomes
- B. Sex chromosomes
- C. Pseudoautosomes
- D. Monosomes
Explanation: An autosome refers to any chromosome not considered a sex chromosome. Autosomes are mainly associated with the various metabolic functions…
Correct answer: Autosomes- A. Isomorphic
- B. Teleomorph
- C. Heteromorphic
- D. Monosomes
Explanation: A chromosome pair with some homology but differing in size, shape, or staining properties.
Correct answer: Heteromorphic- A. Chromosome 11
- B. Chromosome 19
- C. X-chromosome
- D. Y-chromosome
Explanation: SRY is the male-determining gene. It is located at the tip of the short arm of the Y-chromosome.
Correct answer: Y-chromosome- A. 21
- B. 22
- C. 23
- D. 24
Explanation: In some grasshoppers males and females have different number of chromosomes.
Correct answer: 23- A. 8 pairs of X and 13 pairs of autosomes
- B. 13 pairs of X and 8 pairs of autosomes
- C. 6 pairs of X and 15 pairs of autosomes
- D. 15 pairs of X and 6 pairs of autosomes
Explanation: In the roundworm Ascaris incurva, the female has 42 chromosomes in the form of 8 pairs of compound X along with 13 pairs of autosomes…
Correct answer: 8 pairs of X and 13 pairs of autosomes- A. XO-XX type
- B. XY-XX type
- C. ZZ-ZW type
- D. Both (B) and (C)
Explanation: This pattern of sex determination is found in Drosophila, man and many other organisms. Male is XY and female is XX.
Correct answer: XY-XX type- A. A
- B. B
- C. C
- D. D
Explanation: Hemophilia A, also called factor VIII (8) deficiency or classic hemophilia, is a genetic disorder caused by missing or defective factor…
Correct answer: A- A. A
- B. B
- C. C
- D. D
Explanation: Hemophilia B, also called factor IX (FIX) deficiency or Christmas disease, is a genetic disorder caused by missing or defective factor IX…
Correct answer: B- A. Hemophilia A
- B. Hemophilia B
- C. Hemophilia C
- D. Testicular feminization syndrome
Explanation: In hemophilia C, you don't have the clotting factor or blood protein XI, sometimes called factor 11, because you didn't inherit the F11…
Correct answer: Hemophilia C