DNA, Genes & Genetics MCQs with Answers

A major source of variation within a population of a given species that results from crossing-over is ?

• A.Mutation
• B.Natural Selection
• C.Genetic Recombination
• D.Gene Flow

MN blood group system is example of ?

• A.Incomplete dominance
• B.Complete dominance
• C.Co-dominance
• D.Multiple allelism

Past Paper MCQ

The synthesis of an RNA molecule from DNA is called _?

• A.Transformation
• B.Translation
• C.Replication
• D.Transcription

The genotype for the height of an organism is written as Tt. What conclusion may be drawn?

• A.The organism is homozygous for height
• B.There are at least two different alleles of the gene for height
• C.Height is determined by only one allele
• D.The T allele is recessive and t is dominant

The type of RNA that provides the site where polypeptides are assembled is _?

• A.mRNA
• B.tRNA
• C.rRNA
• D.snRNA

Heredity refers to all those traits which a child acquires from:

• A.Siblings
• B.Environment
• C.Teachers
• D.Parents

Which phenomenon increases the chances of variations?

• A.Crossing Over
• B.Mitosis
• C.DNA Replication
• D.Binary Fission

DNA can be specifically tested by _?

• A.Feulgen reaction
• B.Biuret test
• C.Iodine test
• D.Xanthoproteic test

The DNA fragments have sticky ends due to?

• A.Unpaired bases
• B.Paired bases
• C.Phosphate groups
• D.Sugar molecules

In RNA, thymine is replaced by?

• A.Adenine
• B.Guanine
• C.Uracil
• D.Cytosine