DNA, Genes & Genetics MCQs with Answers

Chromosomes consist of two genetically identical copies of thread called?

• A.Chromatin
• B.Chromatids
• C.Centromeres
• D.Centrioles

What is the carrier of genetic information in cells?

• A.Protein
• B.RNA
• C.DNA
• D.Carbohydrate

In di-hybrid cross, the ratio in F₂ generation is _?

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

Chromosomes with one arm very small and the other very long are called ?

• A.Acrocentric
• B.Metacentric
• C.Telocentric
• D.Submetacentric

Reverse transcriptase converts?

• A.ss DNA to ds RNA
• B.ds DNA to ss RNA
• C.ss RNA to ds DNA
• D.ds RNA to ss DNA

A chromosome with unequal length of its arms is?

• A.Metacentric
• B.Acrocentric
• C.Sub metacentric
• D.Telocentric

Which among the following can best describe a mutation occurring in a noncoding region of genome?

• A.Silent mutation
• B.Neutral variation
• C.Frameshift mutation
• D.Missense mutation

_ is the backbone of DNA?

• A.Sugar and Phosphate
• B.Nitrogenous bases only
• C.Amino acids
• D.Lipids and Proteins

Phosphodiester bond is present in _?

• A.DNA
• B.RNA
• C.Both DNA and RNA
• D.Proteins

A gamete without any sex chromosome is termed as _?

• A.Nullo gamete
• B.Monosomic gamete
• C.Disomic gamete
• D.Polysomic gamete