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 12 of 62
- A. The flower is self-pollinating in these plants
- B. Peas bear a large number of "offspring"
- C. Because the varieties are so distinctive
- D. He maintained extremely accurate records
Explanation: Gregor Mendel ensured that his pea plants were purebred by carefully controlling their pollination.
Correct answer: The flower is self-pollinating in these plants- A. 1/4
- B. 2/4
- C. 3/4
- D. All would be heterozygous
Explanation: When they are crossed one will be homozygous dominant 2 are heterozygous and one is homozygous recessive so the proportion of heterozygous…
Correct answer: 2/4- A. 1
- B. 2
- C. 3
- D. 4
Explanation: 4 gametes will be produced. these will be P, p, R, r.
Correct answer: 4- A. All brown
- B. Half brown
- C. 3/4 brown, 1/4 blue
- D. Not enough information is given
Explanation: Since we don't know whether the brown-eyed man is homozygous or heterozygous we cannot find the possible proportion of eyes color in their…
Correct answer: Not enough information is given- A. Study the mechanics of inheritance
- B. Discover that chromosomes are responsible for inheritance
- C. Use statistical methods in analyzing his results
- D. All of the above
Explanation: By simply counting peas and keeping meticulous notes, Mendel established the principles of inheritance, coined the terms dominant and…
Correct answer: Use statistical methods in analyzing his results- A. Heterozygous
- B. Homozygous recessive
- C. Homozygous dominant
- D. Either homozygous recessive or heterozygous
Explanation: Hence, an individual with a recessive phenotype has to be homozygous for both the alleles.
Correct answer: Homozygous recessive- A. Allele
- B. Gene
- C. Locus
- D. Factor
Explanation: Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins.
Correct answer: Gene- A. Gene
- B. Allele
- C. Factor
- D. Locus
Explanation: Locus is a term that we use to tell us where on a chromosome a specific gene is.
Correct answer: Locus- A. Allele
- B. Locus
- C. Gene
- D. Mutation
Explanation: Variations occur as a result of recombination and mutation. Variations enable organisms to adapt to environmental conditions.
Correct answer: Mutation- A. Allele
- B. Gene
- C. Locus
- D. Factor
Explanation: "Allele" is the word that we use to describe the alternative form or versions of a gene.
Correct answer: Allele- A. Gene pool
- B. Genotype
- C. Phenotype
- D. Mutation
Explanation: "Phenotype" simply refers to an observable trait. "Pheno" simply means "observe" and comes from the same root as the word "phenomenon".
Correct answer: Phenotype- A. Cross fertilized
- B. Self fertilized
- C. Unisexual
- D. Short generation time
Explanation: Mendel selected pea plants for his experiments due to their easily detectable, contrasting characters.
Correct answer: Short generation time- A. Self fertilized
- B. Cross fertilized
- C. Unisexual
- D. Hermaphrodite
Explanation: Plants that undergo self-fertilisation for several generations, such that their traits under consideration remain unchanged are known as…
Correct answer: Self fertilized- A. True breed
- B. Dihybrids
- C. Monohybrids
- D. Hybrid
Explanation: "A monohybrid cross is the hybrid of two individuals with homozygous genotypes which result in the opposite phenotype for a certain…
Correct answer: Monohybrids- A. Monohybrid cross
- B. Reciprocal cross
- C. Dihybrid cross
- D. Hybrid cross
Explanation: A dihybrid cross describes a mating experiment between two organisms that are identically hybrid for two traits.
Correct answer: Dihybrid cross- A. P1 generation
- B. F1 generation
- C. F2 generation
- D. F3 generation
Explanation: In basic terminology, the F1 generation is the first generation of offspring produced by a set of parents.
Correct answer: F1 generation- A. Recessive
- B. Hybrid
- C. Dominant
- D. None of the above
Explanation: Since tall is a dominant character and all the parents are homozygous and their offspring are heterozygous dominant.
Correct answer: Dominant- A. Mutation
- B. Phenotype
- C. Genotype
- D. Gene pool
Explanation: A genotype is a scoring of the type of variant present at a given location (i.e., a locus) in the genome.
Correct answer: Genotype- A. Gene pool
- B. Genotype
- C. Phenotype
- D. Mutation
Explanation: A gene pool refers to the combination of all the genes (including alleles) present in a reproducing population or species.
Correct answer: Gene pool- A. Genotype
- B. Gene pool
- C. Mutation
- D. Phenotype
Explanation: A gene pool refers to the combination of all the genes (including alleles) present in a reproducing population or species.
Correct answer: Gene pool