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B6: Quiz 3 – Answers
B6: Quiz 3 – Answers
1)
a) Gametes are sex cells. Male gametes are sperm and female gametes are eggs
b) 23
c) Meiosis
d) The reproductive organs
Or, male gametes are produced in the testes, and female gametes are produced in the ovaries
2)
a) The genetic material is copied/ duplicated
b) 2 cell divisions
c)
i) 4 gametes are produced
ii) They are genetically different
3)
a) Fertilisation is when a sperm cell and an egg meet/ fuse together
b) 23 pairs or 46
c)
i) Mitosis
ii) Genetically identical
d) As the embryo develops, the cells will start to differentiate into different specialised cells such as skin cells, blood cells, hair cells etc.
a) Gametes are sex cells. Male gametes are sperm and female gametes are eggs
b) 23
c) Meiosis
d) The reproductive organs
Or, male gametes are produced in the testes, and female gametes are produced in the ovaries
2)
a) The genetic material is copied/ duplicated
b) 2 cell divisions
c)
i) 4 gametes are produced
ii) They are genetically different
3)
a) Fertilisation is when a sperm cell and an egg meet/ fuse together
b) 23 pairs or 46
c)
i) Mitosis
ii) Genetically identical
d) As the embryo develops, the cells will start to differentiate into different specialised cells such as skin cells, blood cells, hair cells etc.
Questions
1)
a) What are gametes? Give the names of the male and female human gametes.
b) How many chromosomes do human gametes have?
c) What is the name of the cell division process that produces gametes?
d) Where are male and female gametes produced in humans?
2) Gametes are produced by a process known as meiosis.
a) What happens to the genetic material at the start of the meiosis process?
b) How many cell divisions take place in meiosis?
c)
i) How many gametes are produced during meiosis?
ii) Are the gametes produced genetically the same or different?
3)
a) Describe what happens during fertilisation/ gamete fusion.
b) In humans, how many chromosomes does a fertilised egg have?
c) After fertilisation, the fertilised egg will make many copies of itself by dividing.
i) What is the name for the cell division that the fertilised egg undertakes?
ii) Will the cells produced by this cell division be genetically identical or genetically different?
d) The dividing of a fertilised egg produces an embryo. What happens to the cells as the embryo starts to develop?
1)
a) What are gametes? Give the names of the male and female human gametes.
b) How many chromosomes do human gametes have?
c) What is the name of the cell division process that produces gametes?
d) Where are male and female gametes produced in humans?
2) Gametes are produced by a process known as meiosis.
a) What happens to the genetic material at the start of the meiosis process?
b) How many cell divisions take place in meiosis?
c)
i) How many gametes are produced during meiosis?
ii) Are the gametes produced genetically the same or different?
3)
a) Describe what happens during fertilisation/ gamete fusion.
b) In humans, how many chromosomes does a fertilised egg have?
c) After fertilisation, the fertilised egg will make many copies of itself by dividing.
i) What is the name for the cell division that the fertilised egg undertakes?
ii) Will the cells produced by this cell division be genetically identical or genetically different?
d) The dividing of a fertilised egg produces an embryo. What happens to the cells as the embryo starts to develop?