What is a test cross? What is its utility?

Important Questions on Heredity and Variation

EASY

12th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 6

Define incomplete dominance.

HARD

12th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 7

How can you understand that two genes are codominant genes?

HARD

12th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 8

What is split gene?

EASY

12th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 9

What system of sex determination is followed in bird and honeybee?

EASY

12th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 10

How can you understand that two genes are linked by complete linkage?

EASY

12th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 11

What is the significance of crossing over?

EASY

12th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 12

Mention two sex-linked genes in human.

MEDIUM

12th West Bengal Board

IMPORTANT

A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 13

What is Royal haemophilia?