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 35 of 62
- A. Linkage
- B. Dominance
- C. Purity of gametes
- D. Independent assortment
Explanation: Gregor Mendel, through his work on pea plants, discovered the fundamental laws of inheritance.
Correct answer: Linkage- A. 0%
- B. 25%
- C. 50%
- D. 100%
Explanation: After crossing between white-eyed female (XWXW) with red-eyed male (X+Y), in the F1 generation, all the females flies were red-eyed and…
Correct answer: 100%- A. Satellites
- B. Kinetochores
- C. Nuclear organisation
- D. Telomeres
Explanation: The terminal ends of a chromosome are called telomeres. Hence, option D is the correct option.
Correct answer: Telomeres- A. Linked genes
- B. Dependent genes
- C. Recombinant genes
- D. Independent genes
Explanation: Linked genes are so close to each other, that during division they are not separated, and as a result, are passed on to the next…
Correct answer: Linked genes- A. Complete dominance
- B. Incomplete dominance
- C. Co-dominance
- D. Multiple allelic dominance
Explanation: Mendel's theory discusses complete dominance. Option A is correct.
Correct answer: Complete dominance- A. Blood group A
- B. Blood group B
- C. Blood group AB
- D. Blood group O
Explanation: The blood group AB has both antigen A and antigen B on the surface of red blood cells, making it the only blood group that has both…
Correct answer: Blood group AB- A. 2
- B. 4
- C. 6
- D. 8
Explanation: There are four possible phenotypes for human ABO blood groups. A, B, AB, and O.
Correct answer: 4- A. Co-dominance relation
- B. Polygenic inheritance
- C. Epistasis
- D. Incomplete dominance
Explanation: Polygenic refers to a trait that is controlled by multiple genes. Such traits are often influenced by the interaction of many genes and…
Correct answer: Polygenic inheritance- A. 25%
- B. 50%
- C. 75%
- D. 100%
Explanation: If a haemophilic male marries a carrier female, there is a 50% chance that their next child will be haemophilic.
Correct answer: 50%- A. O negative
- B. O positive
- C. A positive
- D. B positive
Explanation: If you have A negative blood you can donate to anyone with a blood type of A or AB regardless of the positive or negative.
Correct answer: A positive- A. Codominance
- B. Sex-influenced traits
- C. Multiple alleles
- D. Incomplete dominance
- E. Sex-limited traits
Explanation: Codominance is a genetic scenario where both alleles in a heterozygous individual are fully expressed, leading to a phenotype that…
Correct answer: Codominance- A. Codominance
- B. Polygenic inheritance
- C. Multiple alleles
- D. Incomplete dominance
- E. Epistasis
Explanation: Polygenic inheritance is a form of genetic inheritance where multiple genes (often located on different chromosomes) contribute to a…
Correct answer: Polygenic inheritance- A. Protanopia
- B. Monochromacy
- C. Dichromacy
- D. Deuteranopia
- E. Tritanopia
Explanation: Tritanopia is a rare form of color blindness where a person is unable to perceive blue light due to the absence or malfunction of blue…
Correct answer: Tritanopia- A. Co-Dominance
- B. Complete Dominance
- C. Incomplete Dominance
- D. Over Dominance
Explanation: In overdominance, heterozygous individuals have a survival or reproductive advantage over homozygous individuals.
Correct answer: Over Dominance- A. Co-dominance
- B. Complete dominance
- C. Incomplete dominance
- D. Over dominance
Explanation: This is correct. In incomplete dominance, the heterozygous phenotype is an intermediate of both alleles (e.g., red × white flowers…
Correct answer: Incomplete dominance696. The genetic makeup that your parents have transferred to you for your hair color makes up your:
- A. Genotype
- B. Karyotype
- C. Phenotype
- D. None of the above
Explanation: A genotype is the genetic makeup of an individual, consisting of the specific alleles (variants of a gene) inherited from their parents.
Correct answer: Genotype- A. All female offspring of the affected father will be affected.
- B. Half of the female offspring of the affected father will be affected.
- C. No male offspring of an affected mother will be affected.
- D. No female offspring of the affected father will be affected.
Explanation: In X-linked dominant inheritance, an affected father will pass the trait to all his daughters (since he contributes his affected X…
Correct answer: All female offspring of the affected father will be affected.- A. Allele
- B. Genetic code
- C. Genotype
- D. Trait
Explanation: A trait is a specific characteristic or feature of an organism, influenced by genetics and sometimes environmental factors.
Correct answer: Trait- A. Some new plants which are different from parental plants are produced
- B. Genes for different traits like color and shape of seed always stay together
- C. Dihybrid cross follows the law of independent assortment
- D. Dominant traits of color and shape of seed appeared in the F1 generation
Explanation: According to Mendel's law of independent assortment, genes for different traits segregate independently unless they are linked.
Correct answer: Genes for different traits like color and shape of seed always stay together- A. Typhoid
- B. Dysentery
- C. Hemophilia
- D. Color blindness
Explanation: Hemophilia is a genetic disorder where blood fails to clot properly.
Correct answer: Hemophilia