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. Protanopia
- B. Deuteranopia
- C. Tritanopia
- D. Protanomalous
Explanation: In colour blindness: Types of colour blindness. ...to red is known as protanopia, a state in which the red cones are absent, leaving only…
Correct answer: Protanopia- A. Protanopia
- B. Deuteranopia
- C. Tritanopia
- D. Protanomalous
Explanation: In colour blindness: Types of colour blindness. ...to red is known as protanopia, a state in which the red cones are absent, leaving only…
Correct answer: Deuteranopia- A. Monochromacy
- B. Dichromacy
- C. Protanomalous
- D. Deuteranomalous
Explanation: Complete color blindness, a complete inability to distinguish colors. Affected persons cannot perceive colors, but only shades of gray.
Correct answer: Monochromacy- A. Dietary
- B. Metabolic
- C. Hereditary
- D. Accidental
Explanation: Hypophosphatemic rickets is a disorder of bone mineralization caused due to defects (inherited/acquired) in the renal handling of…
Correct answer: Hereditary- A. tfm
- B. Se
- C. SRY
- D. h
Explanation: SRY, the mammalian Y-chromosomal testis-determining gene, induces male sex determination.
Correct answer: SRY- A. Pattern baldness
- B. Hemophilia
- C. Color blindness
- D. Albinism
Explanation: Men inherit their "X" chromosome from their mother and "Y" from their father.
Correct answer: Pattern baldness- A. Hemophilia
- B. Colour blindness
- C. Diabetes insipidus
- D. Diabetes mellitus
Explanation: Diabetes mellitus (DM) is a metabolic disease, involving inappropriately elevated blood glucose levels.
Correct answer: Diabetes mellitus- A. Codominance
- B. Epistasis
- C. Pleiotropy
- D. Sex-linkage
Explanation: "PLEIOTROPY" refers to the phenomenon in which a single locus affects two or more apparently unrelated phenotypic traits and is often…
Correct answer: Pleiotropy- A. Dominance
- B. Incomplete dominance
- C. Over dominance
- D. Codominance
Explanation: Codominance, as it relates to genetics, refers to a type of inheritance in which two versions (alleles) of the same gene are expressed…
Correct answer: Codominance- A. Dominance
- B. Incomplete dominance
- C. Over dominance
- D. Codominance
Explanation: Overdominance is a phenomenon in genetics where the phenotype of the heterozygote lies outside the phenotypical range of both homozygous…
Correct answer: Over dominance- A. Morgan
- B. Bridges
- C. Correns
- D. De Varies
Explanation: One of his coworkers Calvin Bridges, observed an unusual white eye mutant male fly.
Correct answer: Bridges412. Which of the following traits is transmitted directly from an affected father to only his sons?
- A. Autosomal
- B. X-linked
- C. Y-linked
- D. X and Y linked
Explanation: Trait expression and transmission is only in males, the individuals with the Y chromosome.
Correct answer: Y-linked- A. Linkage
- B. Crossing over
- C. Independent assortment
- D. Dominance
Explanation: Gene linkage also minimizes the chances of genetic recombination and variations among offspring
Correct answer: Linkage414. When a hemophiliac carrier woman marries a normal man, who among her offspring may be affected:
- A. All her children
- B. All daughters
- C. Half of her daughter
- D. Half of her sons
Explanation: Since the woman is the carrier and the man is normal half of her sons will be hemophilic because they get the X gene from their mother and…
Correct answer: Half of her sons- A. Tahir and Mary are homozygous for brown eyes
- B. Jawaria and Juhi are identical twins
- C. Juhi is heterozygous for blue eyes
- D. Juhi is homozygous for blue eyes
- E. Jawaria and Saad are homozygous for brown eyes
Explanation: It is imperative for a recessive trait present in a homozygous state to show up in phenotype so answer D is correct.
Correct answer: Juhi is homozygous for blue eyes- A. 1
- B. 2
- C. 3
- D. 4
Explanation: ABO blood groups in humans are controlled by the gene I. It has three alleles: IA, IB, and i.
Correct answer: 2- A. Gene linkage of P and Q
- B. Independent segregation of P and Q
- C. Mendelian dihybrid Inheritance
- D. Multiple alleles
- E. Polygenic Inheritance
Explanation: When a pure breeding phenotypic dominant character P and recessive character Q is crossed with pure breeding recessive character P and…
Correct answer: Gene linkage of P and Q- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The obtained ratio is 12 red to 6 white, hence 2:1. The expected ratio can be calculated by crossing two F1 generations: Bb x Bb will give…
Correct answer: Option C- A. 1 and 2
- B. 1 and 3
- C. 2 and 4
- D. 2 and 3
- E. 3 and 4
Explanation: Different living and nonliving things in a single habitat form a single community.
Correct answer: 3 and 4- A. 0
- B. 0.25
- C. 0.50
- D. 0.75
- E. 1.00
Explanation: The cross below shows that all the male offspring are heterozygous and express the dominant phenotype.
Correct answer: 1.00