PHYSIOLOGY
REPRODUCTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
An implanted embryo splits
|
|
|
More than one ovum is fertilized
|
|
|
The egg cell splits in hlaf
|
|
|
The sperm cell pass on chromosomes
|
Detailed explanation-1: -Two separate eggs (ova) are fertilised by two separate sperm, resulting in fraternal or ‘dizygotic’ (two-cell) twins. These babies will be no more alike than siblings born at separate times. The babies can be either the same sex or different sexes, with the odds roughly equal for each.
Detailed explanation-2: -Because fraternal twins are conceived by two separate eggs being fertilized by two different sperm, sometimes days or even weeks apart, it is possible for fraternal twins to be fathered by sperm from two different men.
Detailed explanation-3: -Fraternal twins, also known dizygotic (DZ) or nonidentical twins, are twins that result from two separate eggs released from the ovary and fertilized by two different sperm cells within the same menstrual cycle. The two fertilized eggs implant in the uterus and develop during one pregnancy.