Chapters 14-15: Reproduction and Variation Flashcards Preview

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Flashcards in Chapters 14-15: Reproduction and Variation Deck (9)
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1
Q

What is asexual reproduction?

A

A type of reproduction involving only 1 parent, creating genetically identical offspring (however they may appear different due to environmental variation). There is no fusion of gametes and the only type of cell division involved is mitosis

2
Q

What is binary fission?

A

When a bacteria reproduces asexually by splitting in two

3
Q

What is vegetative reproduction?

A

Any asexual reproduction without forming seeds or spores

4
Q

What is sexual reproduction?

A

A type of reproduction involving 2 parents, creating offspring with DNA from both parents. The male gamete and the female gamete fuse and fertilisation occurs

5
Q

What are the gametes in plants?

A

Pollen and ova

6
Q

Why do animals that do not care for their young need to produce more ova?

A

To increase the number of their offspring that reach sexual maturity

7
Q

What is selective breeding?

A

A process where humans choose animals to breed together so that their offspring have more desirable characteristics

8
Q

Why do non-identical twins form?

A

A woman releases 2 eggs during ovulation which are fertilised by 2 different sperm and develop simultaneously in the uterus

9
Q

Why do identical twins form?

A

One fertilised egg splits into 2 cells, which each develop into identical fetuses