Embryology Flashcards Preview

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Flashcards in Embryology Deck (14):
1

Meiosis produces ___

haploid cells

2

Mitosis produces___

diploid cells

3

Meiotic daughter cells are genetically different from the parent cell. True or False?

True

4

Crossing over occurs in meiosis but not in mitosis. True or False?

True

5

When does crossing over occur?

Prophase I

6

Which one of the following is not a stage of embryogenesis?

cleavage
meiosis
gastrulation
organogenesis

meiosis

7

All major organ systems appear in the early form of a distinctly humanlike body during the

embryonic period

8

The series of mitotic divisions that transforms the zygote into a blastocyst is called

cleavage

9

Implantation of the blastocyst involves prior development for at least two weeks within the uterine lumen. True or False?

False

10

Implantation of the blastocyst involves subdivision of the trophoblast into a cellular inner layer and a thick outer layer. True or False?

True

11

Implantation of the blastocyst involves burrowing into the endometrium by cells of the syncytiotrophoblast. True of False?

True

12

Implantation of the blastocyst involves contact between the blastocyst and pools of nutrients in the uterine glands. True of False?

True

13

Gastrulation begins with the formation of the

primitive streak

14

The three extraembryonic membranes are the

yolk sac, amnion, and chorion