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KA S1 BGE Science > S1 DNA and Inheritance > Flashcards

S1 DNA and Inheritance Flashcards

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Biology 101 flashcards
1
Q

Why is sexual reproduction important?

A

Reproduction ensures a species will survive from one generation to the next and pass on important genetic information.

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2
Q

Why is the nucleus important?

A

The nucleus controls the cell and holds all the genetic information.

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3
Q

Where would you find our genetic information?

A

Chromosomes

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4
Q

How many chromosomes do humans have?

A

46

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5
Q

What is the general name for sex cells?

A

Gamete

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6
Q

What is the male gamete?

A

Sperm

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7
Q

Where is sperm made?

A

Testes

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8
Q

What is the female gamete?

A

Egg

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9
Q

Where are eggs made?

A

Ovaries

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10
Q

How many chromosomes do sperm and egg cells have?

A

Each have 23 chromosomes

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11
Q

Why do sperm have tails?

A

To help them swim towards the egg

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12
Q

What is the purpose of the urethra?

A

It carries sperm down the penis

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13
Q

What is the purpose of the penis?

A

To deliver sperm into the female

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14
Q

What is the purpose of the sperm duct?

A

Moves sperm from the testes (where it’s made) to the urethra

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15
Q

What is the fluid in which sperm are found?

A

Semen

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16
Q

Testes are found in the scrotum, which hang on the outside of the male body.

Why is this?

A

Sperm require lower temperatures to survive than they would find inside the body.

17
Q

What is the male sex hormone?

A

Testosterone

18
Q

What is the purpose of the oviduct?

A

Moves the egg from the ovary to the uterus

19
Q

What is the purpose of the uterus?

A

It is where a fertilised egg develops into a baby.

20
Q

What is the purpose of the vagina?

A

It is where sperm enters the female.

21
Q

Where is the ONLY place fertilisation takes place?

A

The oviduct!

22
Q

What happens during fertilisation?

A

The egg and the sperm fuse together.

23
Q

What does a fertilised egg turn into?

A

An EMBRYO

24
Q

After 2-3 months, what does the embryo become?

A

A FOETUS

25
Q

What does a foetus become when it is born?

A

A baby!

26
Q

What is the name of the organ that allows oxygen and nutrients to be transferred to the embryo?

A

The placenta

27
Q

What is the shape of a DNA molecule?

A

Double helix

28
Q

What is the name of the molecule that contains our genetic information?

A

DNA

KA S1 BGE Science (7 decks)

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