NEET Genetics and Evolution

Question 1

Which of Mendel's laws states that alleles for different traits are inherited independently of each other?

Accepted Answer

Law of Independent Assortment

Answer

Law of Dominance

Answer

Law of Segregation

Answer

Law of Blending

Question 2

In a monohybrid cross between two heterozygotes (Aa × Aa), what is the expected phenotypic ratio in the offspring?

Accepted Answer

3:1

Answer

1:2:1

Answer

1:1

Answer

9:3:3:1

Question 3

An allele that is expressed in the phenotype only when present in homozygous form is called:

Accepted Answer

Recessive

Answer

Dominant

Answer

Codominant

Answer

Epistatic

Question 4

A cross between a homozygous dominant (AA) and a homozygous recessive (aa) parent produces offspring that are:

Accepted Answer

All heterozygous (Aa)

Answer

All dominant phenotype (AA)

Answer

All recessive phenotype (aa)

Answer

Half dominant and half recessive

Question 5

Which of the following is the best example of codominance in genetics?

Accepted Answer

ABO blood group type AB in humans

Answer

Blue eyes vs. brown eyes in humans

Answer

Tall vs. short pea plant height

Answer

Sickle cell disease in homozygous individuals

Question 6

In Mendel's experiments, the trait that was hidden in the F1 generation but reappeared in the F2 generation was called:

Accepted Answer

Recessive

Answer

Dominant

Answer

Epistatic

Answer

Codominant

Question 7

Mendel's Law of Segregation states that:

Accepted Answer

The two alleles of a gene separate during gamete formation so each gamete carries only one allele

Answer

Dominant alleles always mask recessive alleles in heterozygotes

Answer

Genes on different chromosomes always assort independently

Answer

Traits from parents are blended in offspring