DAT DAT - Dental Admission Biology: Genetics and Heredity

Question 1

In a diploid organism, how many alleles does each individual carry for a given gene?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 2

A monohybrid cross between two heterozygotes (Aa × Aa) produces offspring in what phenotypic ratio?

Accepted Answer

3:1

Answer

1:2:1

Answer

1:1

Answer

4:0

Question 3

Which inheritance pattern produces an intermediate phenotype in heterozygotes rather than complete dominance?

Accepted Answer

Incomplete dominance

Answer

Codominance

Answer

Epistasis

Answer

Pleiotropy

Question 4

Mendel's law of independent assortment states that genes on different chromosomes:

Accepted Answer

Assort independently during gamete formation

Answer

Always stay linked together

Answer

Show incomplete dominance

Answer

Produce identical offspring

Question 5

A carrier of an autosomal recessive disorder has which genotype?

Accepted Answer

Aa

Answer

AA

Answer

aa

Answer

AABB

Question 6

Which chromosomal abnormality is responsible for Down syndrome?

Accepted Answer

Trisomy 21

Answer

Monosomy 21

Answer

Deletion of chromosome 21

Answer

Translocation of chromosome 14