DNA, Genes & Genetics MCQs with Answers

Which of the following characteristics are examples of inherited traits in humans?

• A.Eye color and hair color
• B.Blood group and tongue rolling ability
• C.Attached or free earlobes
• D.All of these

The cross between CC x Cc occurs, and the homozygous dominant is?

• A.1/4
• B.3/4
• C.1/2
• D.1

The type of isomers found associated with DNA are _?

• A.Five
• B.Three
• C.Four
• D.Two

A group of individuals having the same chromosome number is called _?

• A.Phenotype
• B.Genotype
• C.Karyotype
• D.Biotype

Y chromosome in humans ?

• A.Carries few genes
• B.Carries many genes
• C.Is identical to X chromosome
• D.Is absent in males

The complementary base pairing in DNA is important because it?

• A.Allows DNA to function as an enzyme in metabolic reactions
• B.Prevents mutations from occurring in the DNA sequence
• C.Enables DNA to directly synthesize proteins without RNA
• D.Allows DNA to act as a genetic blueprint during replication

When a few individuals separate from a large population and establish a new population, this phenomenon is known as:

• A.Bottleneck effect
• B.Founder effect
• C.Gene flow
• D.Genetic drift

What is the complementary palindromic sequence of CTT AAG?

• A.GAA TTC
• B.GAT ATC
• C.CTA TAG
• D.GTA TAC

A cell containing 92 chromatids at metaphase of mitosis would, at its completion, produce two nuclei each containing how many chromosomes?

• A.23
• B.92
• C.46
• D.184

Gene linkage is confirmed by?

• A.Pedigree analysis
• B.DNA sequencing
• C.Karyotyping
• D.Test cross