Asked by Angel Rebugio on Jun 04, 2024
Verified
Fraternal twins originate from the fertilization of
A) a single egg cell by a single sperm cell.
B) two egg cells by a single sperm cell.
C) a single egg cell by two sperm cells.
D) two egg cells by two sperm cells.
Fraternal Twins
Siblings born at the same time from different eggs, therefore sharing 50% of their genes, similar to ordinary siblings.
Fertilization
The process by which a sperm cell combines with an egg cell to form a zygote, initiating the development of a new organism.
Egg Cells
Female reproductive cells or gametes in animals and plants; in humans, they are also known as ova.
- Comprehend the basic principles of genetic inheritance and variations in fraternal and identical twins.
Verified Answer
PF
Pochon FranciscoJun 09, 2024
Final Answer :
D
Explanation :
Fraternal twins originate from the fertilization of two separate egg cells by two separate sperm cells, leading to two zygotes and two embryos. This is why fraternal twins are also known as dizygotic twins. Option A is incorrect because it describes the fertilization of a single egg by a single sperm, which results in a single zygote and a single embryo. Option B is incorrect because it describes the fertilization of two egg cells by a single sperm, which is biologically impossible. Option C is incorrect because it describes the fertilization of a single egg cell by two sperm cells, which is also biologically impossible.
Learning Objectives
- Comprehend the basic principles of genetic inheritance and variations in fraternal and identical twins.