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.
Last updated
Read the Inheritance notesFree MDCAT chapter notes with key terms1,238 questions · page 45 of 62
- A. 22
- B. 23
- C. 80
- D. 81
Explanation: The correct number of linkage groups in humans is 23.
Correct answer: 23- A. Gill pouches
- B. 4 chambered heart
- C. Teeth
- D. Gills
Explanation: Gill pouches or gill slits are a common feature in all vertebrates during their embryonic stages.
Correct answer: Gill pouches- A. Heterozygous
- B. Recessive
- C. Dominant
- D. Lethal
Explanation: A yellow color is expressed in all F1 offsprings as it masks the effect of green (which then must be recessive) it is a dominant allele…
Correct answer: Dominant- A. Back cross
- B. Test cross
- C. Outcross
- D. Dihybrid cross
Explanation: In a test cross, a dominant phenotype individual is crossed with a homozygous recessive.
Correct answer: Test cross- A. Carrier female in hemophilia
- B. Affected males in hemophilia
- C. Carrier male in hemophilia
- D. Affected female in hemophilia
Explanation: Extremely rare. To have hemophilia as a female, she must inherit the hemophilia gene from both parents.
Correct answer: Affected female in hemophilia- A. Big bang theory is used to explain the origin of the universe
- B. Expansion of the universe after the explosion led to a decrease in temperature
- C. Gases condensed under gravitation and formed galaxies
- D. None of the above
Explanation: The Big Bang theory is the prevailing cosmological model for the universe.
Correct answer: None of the above- A. Mutation
- B. Genetic recombinant during gametogenesis
- C. Gene flow
- D. All A, B, C
Explanation: All of the options (mutation, genetic recombinant during gametogenesis, genetic drift, and gene flow) contribute to genetic variation in…
Correct answer: All A, B, C- A. Sexual selection, natural selection, mutation
- B. Mutation, sexual recombination, genetic drift
- C. Genetic drift, mutation, sexual recombination
- D. Mutation, sexual recombination, natural selection
Explanation: Mutation generates new genetic variations. Sexual recombination leads to further genetic diversity and the combination of different traits…
Correct answer: Mutation, sexual recombination, natural selection- A. 16
- B. 8
- C. 9
- D. 4
Explanation: The total number of gametes that can be produced is given by the formula 2n.
Correct answer: 4- A. A reduction of blood clotting factors
- B. A malfunction of blood clotting factors
- C. A complete absence of blood clotting factors
- D. A reduction in hemopoitic stem cells
Explanation: Hemopoietic stem cells are responsible for producing blood cells, including platelets, which play a crucial role in the blood clotting…
Correct answer: A reduction in hemopoitic stem cells- A. Hereditary disease
- B. Cardiovascular disease
- C. Physiological disease
- D. Immunodeficiency
Explanation: Hemophilia is a serious hereditary disease caused by a deficiency in clotting factors, leading to impaired blood clotting and excessive…
Correct answer: Hereditary disease892. A hemophiliac may
- A. Suffer from immune deficiency
- B. Suffer from respiratory infection
- C. Bleed to death
- D. Suffer from hypertension
Explanation: Hemophiliacs have a deficiency or absence of certain blood clotting factors, which means they are more prone to prolonged and excessive…
Correct answer: Bleed to death893. Hemophillia is of
- A. Two types
- B. Three types
- C. Four types
- D. One type
Explanation: The two main types of hemophilia are A and B, with a third, rarer form called hemophilia C. So, there are a total of 3 types of hemophilia.
Correct answer: Three types- A. Hemophilia - A, Factor VIII
- B. Hemophilia - C, Factor XI
- C. Hemophilia - B, Factor XI
- D. Hemophilia - B, Factor IX
Explanation: Hemophilia B is due to a disturbance in factor IX. Whereas factor XI is associated with hemophilia C.
Correct answer: Hemophilia - B, Factor XI- A. Non-allelic
- B. Recessive
- C. Allelic
- D. Sex linked
Explanation: "Allelic" means that two different traits or disorders are caused by mutations in the same gene.
Correct answer: Allelic- A. 10%
- B. 80%
- C. 20%
- D. 30%
Explanation: The percentage of hemophiliacs suffering from type-B of hemophilia is 20%.
Correct answer: 20%- A. Negligible
- B. 80%
- C. 20%
- D. 30%
Explanation: The frequency of hemophilia-C in human population is less than 1 percent.
Correct answer: Negligible- A. Hemophilia - A
- B. Both Hemophilia A and B
- C. Hemophilia_B
- D. Hemophilia_C
Explanation: Both Hemophilia A and B are X-linked genetic disorders, and they affect men more than women due to the inheritance pattern.
Correct answer: Both Hemophilia A and B- A. Hemophilia-A
- B. Both Hemophilia-A and -B
- C. Hemophilia-B
- D. Hemophilia-C
Explanation: Hemophilia-C is an autosomal genetic disorder and not a sex-linked disease. Both men and women have an equal chance of getting it.
Correct answer: Hemophilia-C- A. Greater than a woman
- B. Equal to a woman
- C. Less than a woman
- D. Variable as compared to woman
Explanation: Hemophilia-A and B are both sex-linked diseases related to the X chromosome.
Correct answer: Greater than a woman