Free Inheritance MCQs with Answers

• A. heridity
• B. heridisk
• C. varaition
• D. none

Explanation: Heredity is the tendency of offspring to resemble their parents because genetic information is transmitted from one generation to the…

• A. XY
• B. XX
• C. XXY
• D. XXX

Explanation: In the usual human chromosome pattern, females have two X sex chromosomes, written XX, while males have XY.

• A. Length of the chromosome
• B. Physical linkage between them
• C. Protein content of the chromosome
• D. Distance between the linked gene loci

Explanation: The correct answer is the 'distance between the linked gene loci.' Recombination frequency is a measure of how often crossing over occurs…

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

Explanation: Crossing over during meiosis involves the exchange of genetic material between homologous chromosomes, leading to new combinations of…

• A. Are linked on homologous chromosomes
• B. Have a wide range of phenotypes
• C. Are codominant
• D. Are pleiotropic

Explanation: The correct answer is that the alleles for body color and wing length are linked on homologous chromosomes.

• A. 46
• B. 22
• C. 80
• D. 23

Explanation: This phenomenon of staying together of all the genes of a chromosome is called linkage.

• A. Genetic recombination
• B. Mutation
• C. Meiosis
• D. Gene linkage

Explanation: Gene linkage is the tendency of DNA sequences that are close together on a chromosome to be inherited together during the meiosis phase of…

• A. Recombination of genes
• B. New trait into species
• C. Reduction in number of chromosomes
• D. Segregation of genes

Explanation: Is correct as In genetics, the term "crossing over" refers to the exchange of genetic material between homologous chromosomes that occurs…

• A. Length
• B. Width
• C. Distance
• D. Thickness

Explanation: The value of Cross over or recombination frequency is directly proportional to the distance between the genes on the gene map.

• A. Position
• B. Function
• C. Start point
• D. End point

Explanation: The locus of a gene on a chromosome refers to its specific location or position on the chromosome.

• A. Mutation
• B. Genetic drift
• C. Crossing over
• D. Gene flow

Explanation: Crossing over is the process by which segments of DNA are exchanged between homologous chromosomes during meiosis, resulting in increased…

• A. 0
• B. 0.25
• C. 0.50
• D. 0.75
• E. 1.00

Explanation: In this problem, we are dealing with a sex-linked trait where the male parent (XbY) carries the recessive allele (b), and the female…

• A. That each pair of alleles assort independently of other pairs of alleles during gamete formation
• B. That alleles of each pair of contrasting trait have unequal probability to assort with the alleles of other pair
• C. That the two coexisting alleles for each trait segregate (separate) from each other at meiosis so that each gamete receives only one of the two alleles
• D. That pertain to inheritance of single trait (monohybrid cross)

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

• A. Different alleles of a gene are both expressed in heterozygous condition
• B. One allele (R) is completely dominant over the other (r)
• C. The phenotype of the heterozygote is intermediate between phenotypes of the two homozygotes
• D. Gene mutations may produce many different alleles of a gene

Explanation: Complete dominance is a form of dominance in a heterozygous condition wherein the allele that is regarded as dominant completely masks the…

• A. Human height
• B. Tongue rolling
• C. Wheat grain color
• D. Human skin color

Explanation: A continuous trait displays a range of expression (such as weight, height, etc.) rather than an all-or-none appearance (such as white or…

• A. Hemophilia
• B. Color blindness
• C. Hypophosphatemia
• D. TFM syndrome

Explanation: Hypophosphatemic rickets is an X-linked dominant trait. The rest of the options i.e.

• A. Fishes
• B. Man
• C. Drosophila
• D. Grasshopper

Explanation: The XO sex-determination system (sometimes X0 sex-determination system) is a system that some species of insects, arachnids, and mammals…

• A. Incomplete dominance
• B. Epistasis
• C. Pleiotropy
• D. Codominance

Explanation: This type of relationship between alleles, with a heterozygote phenotype intermediate between the two homozygous phenotypes, is called…

• A. Mutation in an autosome
• B. Mutation of Y-chromosome
• C. Mutation of X-chromosome
• D. Deficiency of iron

Explanation: Hemophilia is a bleeding disorder that slows the blood clotting process.

• A. Position of gene on homologous chromosomes
• B. Regions of chromosomes
• C. Position of an allele within a DNA molecule.
• D. Close regions of the same chromosomes
• E. A and C

Explanation: The correct answers are Options A and C. A locus refers to the specific position of a gene on a chromosome, and homologous chromosomes…