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 47 of 62
- A. X - linked dominant traits
- B. Y - linked dominant traits
- C. X - linked recessive traits
- D. Y - linked recessive traits
Explanation: Sons receive a Y-chromosome from the father and an X-chromosome from the mother. Whereas daughters receive X-chromosomes from both parents.
Correct answer: X - linked dominant traits- A. Color blindness
- B. Pattern baldness
- C. Hemophilia
- D. Hypophosphatemic rickets
Explanation: Hypophosphatemic rickets inherit 17% more in females as compared to in males.
Correct answer: Hypophosphatemic rickets- A. Dietary rickets
- B. Hypophosphatemic rickets
- C. Osteomalacia
- D. Weakness of bones
Explanation: Hypophosphatemic rickets cannot be cured by taking vitamin D. This is because hypophosphatemic rickets is caused by a deficiency of…
Correct answer: Hypophosphatemic rickets- A. Dietary rickets
- B. Hypophosphatemic rickets
- C. Osteomalacia
- D. Weakness of bones
Explanation: The person have become resistant to vitamin D's message, though vitamin D is not deficient, rather it is genetic communication failure at…
Correct answer: Hypophosphatemic rickets- A. Dietary rickets
- B. Hypophosphatemic rickets
- C. Osteomalacia
- D. Weakness of bones
Explanation: Vitamin D enhances mineral uptake by increasing the absorption of calcium and phosphorus from the digestive tract.
Correct answer: Hypophosphatemic rickets926. Maleness is a:
- A. X - linked trait
- B. Y - linked trait
- C. XY - linked trait
- D. XX - linked trait
Explanation: As SRY gene is carried by short arm of Y-chromosome
Correct answer: Y - linked trait- A. Y - chromosome from father to son only
- B. X - chromosome from father to son only
- C. Y - chromosome from mother to son only
- D. X - chromosome from mother to son only
Explanation: As Y-chromosome is received by male zygote only and SRY is carried by male.
Correct answer: Y - chromosome from father to son only- A. X-linked recessive traits
- B. Y-linked traits
- C. X-linked dominant traits
- D. X X linked traits
Explanation: Genes carried by Y chromosome are transferred to son only as son inherit Y-chromosome from father.
Correct answer: Y-linked traits- A. tfm
- B. D
- C. SRY
- D. H
Explanation: SRY (Sex determining region of Y) is located on the short arm of the Y chromosome and it determines the maleness in humans.
Correct answer: SRY- A. SRY gene
- B. tfm gene
- C. D gene
- D. H gene
Explanation: SRY is considered a male sex switch. It triggers the development.
Correct answer: SRY gene- A. Sex - linked traits
- B. Sex limited traits
- C. Sex influenced traits
- D. X - linked traits
Explanation: They are limited to one sex gender only i.e. either male or female due to their anatomical differences.
Correct answer: Sex limited traits- A. She does not grow a beard herself
- B. She cannot have a gene for beard
- C. She can have a gene for beard
- D. She can pass the genes specifying heavy beard growth to her sons
Explanation: She can have gene for beard but never have beard because she lacks hair follicle underneath the skin required to produce beard.
Correct answer: She cannot have a gene for beard- A. X linked recessive trait
- B. Sex influenced trait
- C. Sex limited trait
- D. X linked dominant
Explanation: Sex -limited trait of exclusively occur in either male or female. However, x-linked dominant traits occur more in male.
Correct answer: Sex limited trait- A. Sex-limited trait
- B. Sex-influenced trait
- C. Y-linked trait
- D. X-linked trait
Explanation: In such traits, a particular sex hormone magnifies the effect of a single allele up to that shown by two alleles pattern boldness.
Correct answer: Sex-influenced trait- A. Sex-limited trait
- B. Sex-influenced trait
- C. Y-linked trait
- D. X-linked trait
Explanation: It is influenced by a particular sex hormone, so that is why it is called so.
Correct answer: Sex-influenced trait- A. Modern genetics
- B. Classical genetics
- C. Population genetics
- D. Phylogenetics
Explanation: Gregor Johann Mendel laid down the foundation of classical genetics by formulating two laws of heredity.
Correct answer: Classical genetics- A. In his farmhouse garden
- B. In his monastery garden
- C. In a public park garden
- D. In his school garden
Explanation: Mendel was a priest. He performed series of breeding experiments on garden pea Pisum sativum in his monastery garden for eleven years…
Correct answer: In his monastery garden- A. 25% round
- B. 50% round
- C. 75% round
- D. 100% round
Explanation: As a result of his monohybrid cross experiments, Gregor Mendel observed the following: Law of Segregation: Mendel found that the offspring…
Correct answer: 75% round- A. Genotype, phenotype
- B. Phenotype, genotype
- C. Vigor, phenotype
- D. Vigor, genotype
Explanation: Mendel devised a cross called test cross, which is used to test the genotype of an individual showing a dominant phenotype.
Correct answer: Phenotype, genotype- A. A genotypically round seed
- B. A phenotypically round seed
- C. A genotypically wrinkled seed
- D. A phenotypically wrinkled seed
Explanation: Round shape in pea seed is dominant character and a dominant phenotype may have two genotypes RR (homozygous round) and Rr(heterozygous…
Correct answer: A phenotypically round seed