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Waste & Gas exchange > Sexual Reproduction > Flashcards

Sexual Reproduction Flashcards

0
Q

Gametes and Zygote difference

A

Gametes Are HAPLOID HALF THE CHROMOSOME NUMBER

Zygote are diploid normal number of chromosomes

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1
Q

Describe it

A

Reproduction by two parents
Offspring are genetically different
Relies on MEIOSIS to create sex cells (gametes)

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2
Q

Meiosis

A

Separates homologous chromosomes then chromatids
Happens in the gonads
Produces haploid cells
Introduces greater variation and diversity to population

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3
Q

Prophase I

A

Homologous chromosomes are next to each other

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4
Q

Prophase I

A

Homologous chromosomes are next to each other

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5
Q

Metaphase I

A

Homologous chromosomes are lined up ward

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6
Q

Anaphase I

A

Homologous chromosomes separate

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7
Q

Telephase I

A

Each daughter cells has two chromosomes

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8
Q

Male gonads

A

Testes, produces sperm

Need to be in scrotum to keep temperature around 35.5

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9
Q

Sperm

A

Produced by meiosis
Haploid
Stored in dpidydymus

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10
Q

Lutenising hormone in males

A

Causes testes to produce larger amount of testosterone

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11
Q

Pathway of sperm

A

Epididymis - Vas Deferens - urethra (fluids are added) which forms semen

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12
Q

How many eggs are produced in females

A

1, there are not four cells produced because only one haploid egg gets most of the nutrients

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13
Q

Female gonads are…

A

Ovaries

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14
Q

Where does fertilization happen

A

Fallopian tubes

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15
Q

What helps move the eggs

A

Cilia in the tubes

16
Q

How do eggs mature

A

In a follicle.

Lutenising hormone causes the follicle to get bigger and causes the egg to be released.

17
Q

What is the folicle called when egg is release

A

Corpus luteum

18
Q

What is produced as the follicle gets bigger

A

Oestrogen is produced. Gets the uterus ready for pregnancy and causes uterus lining to get thicker

19
Q

What does the corpus luteum produce

A

Progesterone - which maintains uterus lining

If woman does not get preg, the copus gets smaller and levels of progesterone decreases. And the uterus lining is lost

20
Q

Gamete of plants

A

Pollen (male) egg female egg)

21
Q

Wind pollinated flowers

A

Pollen are small and dry
Large amounts are produced
Flowers are small

22
Q

Disadvantages of wind pollination

A

Cannot control direction of it

Relies only on luck

23
Q

Animal pollination

A

Flowers and petals brightly colored
Strong scent
Nectar may be secreted
Stigmas are taller than stamens to prevent self pollination

24
Q

A seed

A

Is a fertilized egg

25
Q

Where are plant eggs found

A

Ovaries

26
Q

Where is pollen produced

A

Anther produces pollen by meiosis

Waste & Gas exchange (5 decks)

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