Free Inheritance MCQs with Answers

• A. 100
• B. 1000
• C. 10000
• D. 100000

Explanation: Single gene disorders are caused by defects in one particular gene. There are over 10,000 human disorders caused by a change, known as a…

• A. Chromosome behaviour in mitosis
• B. Chromosome behaviour in meiosis
• C. Cytokinesis in mitosis and meiosis
• D. Mendel's laws have not been explained

Explanation: Mendel's laws (principles) of segregation and independent assortment are both explained by the physical behavior of chromosomes during…

• A. They both carried the disease allele
• B. They are not the parents of the child
• C. They are affected
• D. No conclusions can be drawn

Explanation: They are phenotypically normal but they carried the allele of specific disease and both are heterozygous and when the gametes combine…

• A. Environmental condition
• B. Dominant condition
• C. Recessive condition
• D. Undetected condition

Explanation: To be more specific, two siblings who have kids together have a higher chance of passing on a recessive disease to their kids.

• A. 0
• B. 25
• C. 50
• D. 75

Explanation: Since all the parents are heterozygotes each couple produces 4 children and in them, one is homozygous one is recessive and 2 are…

• A. 0
• B. 25
• C. 50
• D. 100

Explanation: Since one of the individuals is completely recessive and produces only recessive gametes so there is no chance for the individual to show…

• A. 1 : 1 : 1 : 1
• B. 9 : 3 : 3 : 1
• C. 3 : 6 : 3 : 1 : 2 : 1
• D. 1 : 2 : 1 : 2 : 4 : 2 : 1 : 2 : 1

Explanation: When there is a cross between AaBb X AaBb then the genotypic ratio is 1:2:1:2:4:2:1:2:1.

• A. Yes, you can observe random distribution of alleles into gametes
• B. Yes, you can observe random assortment of genes into gametes
• C. No, you must observe genes that are on the same chromosome
• D. No, you must examine the transmission of two or more genes

Explanation: Therefore, Mendel's law of independent assortment can be demonstrated by a dihybrid cross.

• A. Product
• B. Summation
• C. Addition
• D. None of the above is correct

Explanation: One probability rule that's very useful in genetics is the product rule, which states that the probability of two (or more) independent…

• A. 0
• B. 25
• C. 50
• D. 75

Explanation: Risk for homozygous achondroplasia when both parents have achondroplasia is 25% (as well as there being a 50% chance for heterozygous…

• A. Hybrids
• B. Alleles
• C. Genotypes
• D. Gametes

Explanation: A gamete is a reproductive cell of an animal or plant. In animals, female gametes are called ova or egg cells, and male gametes are called…

• A. 9 round yellow; 3 round green: 3 wrinkled yellow: 1 wrinkled green
• B. 3 round yellow; 3 round green: 3 wrinkled yellow: 3 wrinkled green
• C. 3 round yellow; 9 round green: 1 wrinkled yellow: 3 wrinkled green
• D. 9 round yellow; 3 round green: 3 wrinkled yellow: 9 wrinkled green

Explanation: Four types of gametes, i.e., RY, Ry, rY, and ry were formed in equal numbers in a perfect ratio of 1:1:1:1.

• A. Cross pollination
• B. Heredity
• C. Monohybrid
• D. Recessive

Explanation: The transfer of pollen grains from the anther of one plant to the stigma of another different plant is called cross-pollination.

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Explanation: In the question he asked us to find the genotypic ratio since there are 4 genotypes in the question of the correct option is D

• A. The phenomenon of dominance
• B. The law of segregation
• C. The law of independent assortment
• D. All of the above

Explanation: Mendel's law of independent assortment states that the alleles of two (or more) different genes get sorted into gametes independently of…

• A. Shows all gametic combinations
• B. Shows genotypic ratios
• C. Shows phenotypic ratios
• D. Sows (A), (B) and (C)

Explanation: In summary, a Punnett square is a valuable tool in genetics. It allows us to predict the genetic makeup of offspring from a particular set…

• A. Plants with 50% red and 50% white flowers
• B. Plants with red flowers
• C. Plants with pink flowers
• D. Plants with sterile flowers

Explanation: If a homozygous red-flowered plant is crossed with a homozygous white flowered plant, the offspring would be all pink-flowered.

• A. Inheritance
• B. Heredity
• C. Genetics
• D. Variation

Explanation: Genetics research studies how individual genes or groups of genes are involved in health and disease.

• A. Homozygous recessive
• B. Homozygous dominant
• C. Heterozygous
• D. (B) and (C)

Explanation: Only individuals with an aa genotype will express a recessive trait; therefore, offspring must receive one recessive allele from each…

• A. Dominant inheritance
• B. Recessive inheritance
• C. Codominant inheritance
• D. None of the above inheritance

Explanation: Codominance, as it relates to genetics, refers to a type of inheritance in which two versions (alleles) of the same gene are expressed…