Year: 2025
Topic: Principles of Inheritance and Variation
Time :
1.
Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true?
(1). They have 75% identical genetic content.
(2). They are monozygotic twins.
(3). They are fraternal twins.
(4). They were conceived through in vitro fertilization.