Genetics and Molecular Inheritance — Practice

Question 1

The phenotypic ratio of the F₂ generation in a Mendelian monohybrid cross is

Accepted Answer

A

Question 2

The F₂ phenotypic ratio of a dihybrid cross is

Accepted Answer

A

Question 3

A dihybrid plant of genotype RrYy produces how many types of gametes?

Accepted Answer

A

Question 4

In Mirabilis jalapa, red (RR) × white (rr) gives pink (Rr) flowers. This is an example of

Accepted Answer

A

Question 5

The AB blood group in humans is an example of

Accepted Answer

A

Question 6

In humans, the sex of the child is determined by

Accepted Answer

A

Question 7

Haemophilia and colour blindness in humans are inherited as

Accepted Answer

A

Question 8

Down's syndrome is caused by

Accepted Answer

A

Question 9

In a DNA sample, adenine is 20% of the bases. The percentage of cytosine is

Accepted Answer

A

Question 10

The number of hydrogen bonds between guanine and cytosine in DNA is

Accepted Answer

A

Question 11

The Meselson–Stahl experiment established that DNA replication is

Accepted Answer

A

Question 12

The short DNA segments synthesised discontinuously on the lagging strand are called

Accepted Answer

A

Question 13

In RNA, the base that replaces thymine of DNA is

Accepted Answer

A

Question 14

The genetic code is said to be degenerate because

Accepted Answer

A

Question 15

In the lac operon of E. coli, the addition of lactose switches transcription on because lactose

Accepted Answer

A

Practice — Genetics and Molecular Inheritance