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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- A. 2
- B. 4
- C. 6
- D. 8
Explanation: Human skin colour is also a quantitative trait which is controlled by three to six gene pairs.
Correct answer: 6302. Tallness in man is:
- A. Dominant
- B. Recessive
- C. Both
- D. None of the above
Explanation: Mendel called the tall gene dominant, and the short gene recessive.
Correct answer: Dominant- A. Crossing over
- B. Segregation
- C. Linkage
- D. Independent assortment
Explanation: Linkage, as related to genetics and genomics, refers to the closeness of genes or other DNA sequences to one another on the same…
Correct answer: Linkage- A. Qualitative
- B. Quantitative
- C. Polygenic
- D. None of the above
Explanation: A qualitative trait is one that can be classified into one of several categories.
Correct answer: Qualitative- A. Crossing over
- B. Segregation
- C. Linkage
- D. Independent assortment
Explanation: Linked groups are groups of genes, some of which have loci on the same chromosome. They don't independently segregate.
Correct answer: Independent assortment- A. 46
- B. 23
- C. 22
- D. 24
Explanation: The number of linkage groups corresponds to the number of homologous pairs of chromosomes. Man has 23 linkage groups.
Correct answer: 23- A. Normal
- B. Hemophilic
- C. Carrier
- D. All of the above
Explanation: Since the Y chromosome does not carry the hemophilia gene, a son born to a man with hemophilia and a woman who is not a carrier will not…
Correct answer: Normal- A. 1 : 2
- B. 3 : 1
- C. 1 : 1
- D. 1 : 4
Explanation: Since there are three sons of Queen Victoria one of them was hemophilic.
Correct answer: 1 : 2- A. Albumin
- B. Opsins
- C. Histone
- D. Thrombin
Explanation: Opsins are membrane proteins with molecular masses of 30-50 kDa that are related to the protein moiety of the photoreceptive molecule…
Correct answer: Opsins- A. 5
- B. 7
- C. 9
- D. 11
Explanation: The gene for blue opsin is present on autosome 7.
Correct answer: 7311. Deuteranopia is:
- A. Red blindness
- B. Blue blindness
- C. Green blindness
- D. Black blindness
Explanation: People with protanopia are unable to perceive any 'red' light, those with deuteranopia are unable to perceive 'green' light and those with…
Correct answer: Green blindness312. Tritanopia is:
- A. Red blindness
- B. Green blindness
- C. Blue blindness
- D. Black blindness
Explanation: People with protanopia are unable to perceive any 'red' light, those with deuteranopia are unable to perceive 'green' light and those with…
Correct answer: Blue blindness313. Protanopia is:
- A. Red blindness
- B. Blue blindness
- C. Green blindness
- D. Black blindness
Explanation: People with protanopia are unable to perceive any 'red' light, those with deuteranopia are unable to perceive 'green' light and those with…
Correct answer: Red blindness- A. Protanomalous
- B. Protanopia
- C. Tritanopia
- D. Deuteranomalous
Explanation: Some people can detect red and green but with altered perception of the relative shades of these colors.
Correct answer: Protanomalous- A. Protoanomalous
- B. Protanopia
- C. Tritanopia
- D. Deuteranomalous
Explanation: Some people can detect red and green but with altered perception of the relative shades of these colors.
Correct answer: Deuteranomalous- A. Red yellow
- B. Blue green
- C. Red green
- D. Red blue
Explanation: A monochromat can perceive one colour. Monochromacy is true colour-blindness.
Correct answer: Red green- A. 50%
- B. 25%
- C. 100%
- D. 75%
Explanation: If a normal-visioned woman had a color-blind father, the woman will be a carrier (XXc).
Correct answer: 50%- A. SRY
- B. tfm
- C. MAT
- D. None of the above
Explanation: Testicular feminization (TFM) is an inherited disorder which is transmitted by females to half their male offspring.
Correct answer: tfm- A. Male
- B. Female
- C. Both
- D. None of the above
Explanation: X-linked dominant disorders are seen more commonly in females than in males, or in the case of some diseases, affect only females.
Correct answer: Female- A. X-linked
- B. Y-linked
- C. Sex limited
- D. Sex influenced
Explanation: These are genes that occur in both sexes (probably on the autosomes) but are normally expressed only in the gender having the appropriate…
Correct answer: Sex limited