Lesson 3- SEXUAL

Question 1

___________ is the perpetuation of a new organism from ___ organisms with the use of __________.
In this process, male gametes (______) fuses with a female gamete (______) to form a _______ called ________ containing two sets of ____________. During sexual reproduciton the genetic material contained their chromosomes combine to produce _______________________ that is _______ from both parents

Answer 1

~Sexual Reproduction
~two
~gametes
~sperm cell
~egg cell
~diploid cell
~zygote
~chromosomes
~genetically diverse offspring
~different

Question 2

Reproductive cells

Answer 2

Gametes (sperm cell and egg cell)

Question 3

Chromosomes are made of ________ and _______

Answer 3

DNA and protein

Question 4

Sexual reproduction creates _____

Answer 4

diversity

Question 5

Independent Assortment Crossing Over

Answer 5

2 set of parents can make 2 new parents

Question 6

__________ can exist in population due to _____________

Answer 6

Genetic variety
sexual reproduction

Question 7

_________ occurs when the gametes which join together during fertilization come from ____________

Answer 7

Allogamy
two different individuals

Question 8

ALLOGAMY
each sex cell contains only _______ chromosomes (these are called________) rather than the normal 46 chromosomes present in other cells of the body.

Answer 8

23
haploid cells

Question 9

Allogamy
The two haploid cells fuse together to create a __________

Answer 9

diploid cell

Question 10

example of Allogamy

Answer 10

fertilization in humans

Question 11

_____, also known as self-fertilization or self-pollination, is the fusion of male and female gametes, which are produced by a ___________.

Answer 11

Autogamy
single individual

Question 12

AUTOGAMY
Species which are able to produce both male and female gametes are called__________-.

Answer 12

hermaphrodites

Question 13

1. Pollen comes loose from
   ____________.
2. A ________ of the same flower collects pollen.

Answer 13

stamens
pistil

Question 14

[note] Self pollination

Answer 14

1. Autogamy
2. No agent required
3. Male & female parts mature at the same time
4. Can occur even if the flower is closed
5. Offspring can become weak
6. New variety not possible
7. Preserves parental characters

Question 15

[note] Cross pollination

Answer 15

1. Allogamy
2. Agent is required
3. Male & female parts mature at different times
4. Can occur only when flower is open
5. Offspring healthier
6. New variety possiblr
7. Does not preserve parental characters

Question 16

[note] External Fertilization

Answer 16

In salmon, female deposits her ova on the riverbed. The male then deposits his sperm in the water and they swim to fertilise the ova

Question 17

[note] internal fertilization

Answer 17

between a cock and hen

Question 18

Oviparous, Viviparous

Answer 18

egg-laying, gives birth

Question 19

[note] oviparous animal

Answer 19

produces eggs, and the young hatch after being expelled from the body. While fertilization of the egg can occur internally or externally, oviparous animals always hatch their young outside of their body (chicken)

Question 20

[note] viviparous animals

Answer 20

have eggs with very little yolk(if at all) because the female nourishes the embryo internally for a long perio dof time, and the young are born alive (do not hatch) (sea horse, human, koala)

Question 21

[note] Ovoviviparous animals

Answer 21

keep their eggs inside the body until the embryo fully develops and hatches (snakes)