The zygote represents the first stage in the development of a genetically unique organism, the zygote's genome is a combination of the DNA in each gamete and contains all of the genetic information of a new individual organism. In humans and most other anisogamous organisms, a zygote is formed when an egg cell and sperm cell come together to create a new unique organism. the zygote stage is brief and is followed by cleavage when the single cell becomes subdivided into smaller cells. So let's start this quiz and know more about zygotes.
1. How many chromosomes does a human zygote have?
A. 46 chromosomes
B. 22 chromosomes
C. 39 chromosomes
D. 41 chromosomes
2. How many cell divisions occur during the early stages of embryonic development?
A. Five cell divisions
B. Two cell divisions
C. Six cell divisions
D. Four cell divisions
3. What is the name of the structure that surrounds the early embryo?
A. Chorion
B. Placenta
C. Amnion
D. Endometrium
4. When does the zygote become an embryo?
A. After the first cell division
B. After the third cell division
C. After the fourth cell division
D. After the second cell division
5. What is the name of the structure that forms from the outer layer of the blastocyst?
A. Trophoblast
B. Blastomere
C. Embryoblast
D. Zona pellucida
6. How many times does a zygote divide, After 30 hours?
A. Ten times
B. Two times
C. Seven times
D. Three times
7. How long does it take a zygote to develop?
A. 1 to 2 days
B. 2 to 3 days
C. 3 to 5 days
D. 7 to 9 days
8. In how many days does a zygote become an embryo?
A. 2 days
B. 3 days
C. 5 days
D. 9 days
9. How many sperm cells must enter the egg to form a zygote?
A. Ten sperm cell
B. Five sperm cell
C. Two sperm cell
D. Single sperm cell
10. Where does the implantation occur and does the zygote develop?
A. In the uterus
B. In the ovary
C. In the vagina
D. In the fallopian tube
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