Chapter 27

Question 1

Sperm (spermatoza)

Answer 1

gametes in males

Question 2

Ova (ovum or eggs)

Answer 2

gametes in females

Question 3

Gametes from males and female together via

Answer 3

sexual intercourse (copulation)

Question 4

Combination Genetic info contained within gametes via

Answer 4

fertilization

Question 5

sperm and egg together form a ____

Answer 5

zygote

Question 6

support development of fetus is called

Answer 6

gestation

Question 7

birth of baby is called

Answer 7

parturition

Question 8

Embryo is (how many months)

Answer 8

1-3 months

Question 9

fetus is (how many months)

Answer 9

3-9 months

Question 10

Somatic cells are

Answer 10

body cells (except sex cells -sperm/egg)

Question 11

How do somatic cells reproduce?

Answer 11

via mitosis

Question 12

How many chromosomes do somatic cells have?

Answer 12

23 pairs

46 chromosomes

Question 13

How do gametes reproduce (sex cells) ?

Answer 13

Meiosis

Question 14

How many chromosomes do gametes have?

Answer 14

23 chromosomes

Question 15

XX chromsomes (female) how many genes in X ?

Answer 15

1000 genes

Question 16

XY chromosomes in MALES how many genes in Y

Answer 16

100 genes

Question 17

Which gender is more susceptible to sex linked conditions?

Answer 17

males

Question 18

Mitosis process is used for growth _____

Answer 18

development and repair

Question 19

gametogenesis is the

Answer 19

production of offspring in the gonads

Question 20

gonads produce

Answer 20

sex hormones and gametes

Question 21

How much sperm produced daily?

Answer 21

90 million

Question 22

How long does spermatogensis take?

Answer 22

64- 72 days

Question 23

When does spermatogensis begin?

Answer 23

pubery 14 years old

Question 24

Sustenocytes are

Answer 24

“nurse cells” nourishes growing sperm so it can survive and joined by tight junctions

Question 25

when the sperm elongates cytoplasm is removed and a tail is formed to allow ….

Answer 25

motility

Question 26

The head of sperm consists of nucleus and the tip called ____

Answer 26

acrosome

Question 27

The acrosome produces hydrolotic enzyme so

Answer 27

sperm can easily penetrate egg

Question 28

The midpiece of sperm is the ________ and produces ____

Answer 28

mitochondra, ATP

Question 29

Oogenesis produces 4 eggs but ….

Answer 29

only one is fertilized

Question 30

In mitosis the genetic composition of each diploid _______ to parent cell

Answer 30

identical

Question 31

In meiosis the diploid cell contains half as many chromosomes as the parent cell and is genetically _______ from parent cell

Answer 31

different

Question 32

Meiosis steps

Answer 32

1. Prophase: Chromosome replication into tetrads through synapse. (chromosomes)
2. Metaphase: Homologous chromosomes align randomly at equator
3. Anaphase: centromeres dont separate, chromosomes separate into opposite poles of cells
4. Telophase: nuclear membranes reform, spindle breaks down, chromatin reappears