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Flashcards in BIO - reproductive Deck (47)
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1

A human cell after the first meiotic division is --

1N and 2 chromatids

2

What distinguishes meiosis from mitosis?
failure to -- between successive cell divisions
and separation of homologous chromosomes into distinct cells

synthesize DNA

3

primary oocytes (2N cells) are arrested in -- until ovulation

prophase I

4

any genes located in pseudoautosomal regions are inherited just like any -- genes

autosomal

5

pseduoautosomal genes function to allow X and Y chromosomes to pair and properly -- during meiosis in males

segregate

6

T/F: females can inherit an allele originally present on the Y chromosome of their father

true

7

random segregation of -- during meiosis does not contribute to genetic variation

chromatids

8

progesterone and estrogen inhibit -- release which inhibited the release of LH and FSH and prevents additional follicles from maturing

GnRH

9

LH stimulates the release of testosterone by -- (androgens)

Leydig cells

10

Testosterone surges between the 1st and 4th month of life and testosterone inadequacy can lead to --

cryptorchidism

11

cortisol is a stress hormone that elevates -- levels

blood glucose

12

-- stimulates the maturation of gametes

FSH

13

XXY males

Klinefelter

14

XO females

Turner

15

Seminiferous tubules are located in the --

testes

16

epithelium of the seminiferous tubules consists of -- or nurse cells that nourishes the developing sperm and act as phagocytes by consuming the residual cytoplasm during spermatogenesis

Sertoli

17

-- secrete a significant proportion of the fluid that ultimately becomes semen

seminal vesicles

18

unequal division of cytoplasm occurs during the meiotic process of --

oogenesis

19

-- is a motor protein that uses ATP to transport various cell contents by walking along cytoskeletal microtubules towards the minus-end of the microtubule (cell center) which is known as retrograde transport

dynein

20

motor proteins that move toward the plus end of microtubules

kinesins

21

defects in cilia of respiratory tract, fallopian tube, and flagella of sperm cells

Kartagener's syndrome

22

after ovulation during the -- phase, an egg can be fertilized by sperm

luteal phase

23

endometrium is used and reabsorbed by the uterus

estrous cycle (sexual desire)

24

in women progesterone levels are relatively ow during pre-ovulatory phase, rise after ovulation and are elevated during the -- phase

luteal

25

at around 12 weeks, the placenta begins to produce -- in place of the corpus luteum (luteal-placental shift)

progesterone

26

after devilry of the lucent and during lactation, progesterone levels are --

low

27

adult males have progesterone levels similar to those in women during the -- phase of the menstrual cycle

follicular

28

during prophase I, tetrads form and sister chromatids undergo homogenous recombination known as

crossing over

29

total cleavage

holoblastic

30

partial cleavage

meroblastic