Meiosis, Development and Aging

Question 1

Complex multi-step process that is complete in 24 hours

Answer 1

Fertilization

Question 2

• The sperm from a male meets an ovum from a female and forms a zygote
• The first cell that a lead to development of a new individual is a fetilized ovum

Answer 2

Zygote

Question 3

It forms when a _________ form a male and an _________ (also called an egg cell) from a female joint.

Answer 3

sperm
oocyte

Question 4

The point in which pregnancy begins and leads to a ___day journey for a female

Answer 4

280 day

Question 5

Sperm and oocyte are ________, or sex cells

Answer 5

Gametes

Question 6

Paired structures, called _________, where the sperm and oocyte are manufactured:

Answer 6

Gonads

Question 7

Male Gametes:
The _____________ are packed into paired, oval organs called testes.

Answer 7

Seminiferous Tubules

Question 8

Also passes through the epididymis and ductus deferentia, where they mature before exiting the body through the urethra during sexual intercourse.

Answer 8

Male Gametes

Question 9

Originates in the ovaries

Answer 9

Female Gametes

Question 10

The female sex cells develop in paired organs in the abdomen

Answer 10

Ovaries

Question 11

The uterine tube carries the oocyte into a muscular, saclike organ

Answer 11

Uterus or Womb

Question 12

Oocytes are ____________

Answer 12

Female gametes

Question 13

Female Gametes: Each month after puberty, one vary releases an oocyte into a uterine tube.

The oocyte then moves to the uterus for implantation or __________

Answer 13

Expulsion

Question 14

• Packed, paired, oval organs of seminiferous tubules
• Male Gonads

Answer 14

Testes

Question 15

• Lie outside the abdomen within a sac
• This location keeps the testes cooler than the rest of the body for the development of sperm.

Answer 15

Scrotum

Question 16

A tightly coiled tube in which sperm cells mature and are stored.

Answer 16

Epididymis

Question 17

Epididymis continues to another tube

Answer 17

ductus deferens

Question 18

Tube that carries sperm and urine out of body through the penis

Answer 18

Urethra

Question 19

a pleasable sensation. Accompanied by rhythmic muscular contractions that eject the sperm from each ductus deferens

Answer 19

Organsm

Question 20

Discharge of sperm from the penis (delivers 200 to 600 million sperm cells)

Answer 20

Ejaculation

Question 21

3 glands that add secretions along the sperm’s path

Answer 21

Prostate Gland
Seminal Vesicles
Bulbourethral Gland

Question 22

■ The ductus deferentia/deferens pass through this.
■ Produces a thin, milky, acidic fluid that activates the sperm to swim.

Answer 22

Prostate Gland

Question 23

• Opening into the ductus deferens; a duct
• Secrete fructose (an energy-rich sugar) and hormone like
  prostaglandins (stimulates contractions in the female that help sperm and oocytes meet)

Answer 23

Seminal Vesicles

Question 24

■ Each about the size of a pea.
■ For alkalinity of pH mucus.
■ Join the urethra where it passes through the body wall.
■ Secrete an alkaline mucus that coats the urethra before sperm are released.

Answer 24

Bulbourethral Gland

Question 25

○ Female sex cells develop in paired organs in the abdomen. ○ Female gonads ○ Houses oocytes in different stages of development.

Answer 25

Ovaries

Question 26

○ Muscular, saclike organ. ○ The uterine tube carries the oocyte in this organ. ○ Its lower end narrows and leads to the cervix.

Answer 26

Uterus or Womb

Question 27

- Opens into a tubelike vagina

Answer 27

Cervix

Question 28

Where the oocyte (released from the ovary) may encounter the sperm

Answer 28

Uternine Tube

Question 29

Fertilized Ovum - After a day, the first cell divides while moving through the uterine tube. - Settles into a lining of the uterus to continue dividing and developing into an _______. - If not fertilized, it will be expelled through ________.

Answer 29

embryo menstruation

Question 30

Contains one copy of the genome from each parent (haploid)

Answer 30

Germ Cell

Question 31

Contains two copies of the genome (diploid)

Answer 31

Somatic Cells (Body cells)

Question 32

Chromosomes pairs are called

Answer 32

Homologous Pairs

Question 33

A genetically overloaded cell, with more than two sets of chromosomes

Answer 33

Polyploid

Question 34

Meiosis is actually 2 divisions of the genetic material.

Answer 34

Reduction Meiosis Equational Meiosis

Question 35

- Mixes up trait combinations - Occurs after Interphase (replication of DNA)

Answer 35

Meiosis

Question 36

Where games form special cells called

Answer 36

Germline

Question 37

Sculpts the distinctive characteristics of sperm and oocyte

Answer 37

Maturation

Question 38

Contribute 23 different chromosomes constituting one copy of the genome, to a fertilized ovum

Answer 38

Gametes

Question 39

Contain 23 pairs of chromosomes = 46 in total.

Answer 39

Somatic Cells

Question 40

- First division of the genetic material in Meiosis

Answer 40

Reduction Division

Question 41

- Random alignment of chromosomes during metaphase I - Fate of a gene on one chromosome is not influenced by a gene on a different chromosome.

Answer 41

Independent Assortment

Answer 45

Interphase II