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

Diploid organisms carry two alleles for each gene, one inherited from each parent.

Question 2

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

Accepted Answer

3:1

Answer

A monohybrid cross between two heterozygotes yields a 3:1 phenotypic ratio (3 dominant : 1 recessive).

Question 3

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

Accepted Answer

Incomplete dominance

Answer

Incomplete dominance produces an intermediate phenotype in heterozygotes because neither allele is fully dominant over the other.

Question 4

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

Accepted Answer

Assort independently during gamete formation

Answer

The law of independent assortment states that alleles of different genes on non-homologous chromosomes segregate independently during gamete formation.

Question 5

A carrier of an autosomal recessive disorder has which genotype?

Accepted Answer

Aa

Answer

A carrier is heterozygous (Aa), carrying one recessive allele without expressing the recessive phenotype.

DAT Practice Test

DAT Practice Test

DAT DAT - Dental Admission Biology: Genetics and Heredity