BMST BMST - Basic Math and Science Genetics and Heredity Questions and Answers 1

Question 1

What is a gene?

Accepted Answer

A segment of DNA that codes for a protein

Answer

A type of RNA molecule

Answer

A chromosome pair

Answer

A cell membrane protein

Question 2

What term describes an organism that has two identical alleles for a trait?

Accepted Answer

Homozygous

Answer

Heterozygous

Answer

Dominant

Answer

Recessive

Question 3

In a Punnett square cross of Tt × Tt, what fraction of offspring are expected to be TT (homozygous dominant)?

Accepted Answer

1/4

Answer

1/2

Answer

3/4

Answer

0

Question 4

Which nitrogenous base pairs with adenine in a DNA molecule?

Accepted Answer

Thymine

Answer

Cytosine

Answer

Guanine

Answer

Uracil

Question 5

What term describes an allele that is expressed only when two copies are present?

Accepted Answer

Recessive

Answer

Dominant

Answer

Codominant

Answer

Lethal

Question 6

How many chromosomes are found in normal human somatic (body) cells?

Accepted Answer

46

Answer

23

Answer

48

Answer

44