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B6: Quiz 2 – Answers
B6: Quiz 2 – Answers
1)
a) 2 individuals
b)
i) Sex cells
ii) 23
iii) Sperm
iv) Eggs
v) Meiosis
c) 23 pairs or 46
d) The offspring will be genetically different to the parents, which means that we will have variation in the offspring
e) Sexual reproduction brings variation into the population. Variation allows species to adapt to new or changing environments, which may give them a survival advantage. Also, variation in the offspring may mean that diseases are less likely to affect an entire population because the population is genetically different
f) Any 2 from:
2)
a) 1 individual
b) The offspring are genetically identical to the parent, which means that there is no variation in the population
c) Mitosis
d) The 2 advantages are:
a) 2 individuals
b)
i) Sex cells
ii) 23
iii) Sperm
iv) Eggs
v) Meiosis
c) 23 pairs or 46
d) The offspring will be genetically different to the parents, which means that we will have variation in the offspring
e) Sexual reproduction brings variation into the population. Variation allows species to adapt to new or changing environments, which may give them a survival advantage. Also, variation in the offspring may mean that diseases are less likely to affect an entire population because the population is genetically different
f) Any 2 from:
- It takes time and energy to find a mate
- Sexual reproduction cannot be done if you are isolated (on your own)
- Sexual reproduction is a longer process compared to asexual reproduction
2)
a) 1 individual
b) The offspring are genetically identical to the parent, which means that there is no variation in the population
c) Mitosis
d) The 2 advantages are:
- It is a very quick process so organisms can rapidly increase their population
- Only 1 parent is needed so you do not need to waste time and energy to find a mate. You can also reproduce if you are in isolation
Questions
1) This question is all about sexual reproduction.
a) How many individuals are involved in sexual reproduction.
b)
i) What are gametes?
ii) In humans, how many chromosomes do gametes have?
iii) In animals, what is the name for the male gamete?
iv) In animals, what is the name for the female gamete?
v) What is the name of the cell division that produces gametes?
c) This question is referring to humans. A male gamete fertilises a female gamete. How many chromosomes will the cell produced have?
d) Is the genetic material for the offspring from sexual reproduction identical or different to the parent(s)? And does this mean that we have variation in the offspring?
e) Give an advantage of sexual reproduction. Explain your advantage.
f) Give 2 disadvantages of sexual reproduction. You do not need to explain your answer.
2) This question is all about asexual reproduction.
a) How many individuals are involved in asexual reproduction?
b) Is the genetic material for the offspring from asexual reproduction identical or different to the parent(s)? And does this mean that we have variation in the offspring?
c) What is the name of the cell division involved in asexual reproduction?
d) Give 2 advantages of asexual reproduction. Explain your advantages.
e) Give a disadvantage of asexual reproduction. Explain your disadvantage.
1) This question is all about sexual reproduction.
a) How many individuals are involved in sexual reproduction.
b)
i) What are gametes?
ii) In humans, how many chromosomes do gametes have?
iii) In animals, what is the name for the male gamete?
iv) In animals, what is the name for the female gamete?
v) What is the name of the cell division that produces gametes?
c) This question is referring to humans. A male gamete fertilises a female gamete. How many chromosomes will the cell produced have?
d) Is the genetic material for the offspring from sexual reproduction identical or different to the parent(s)? And does this mean that we have variation in the offspring?
e) Give an advantage of sexual reproduction. Explain your advantage.
f) Give 2 disadvantages of sexual reproduction. You do not need to explain your answer.
2) This question is all about asexual reproduction.
a) How many individuals are involved in asexual reproduction?
b) Is the genetic material for the offspring from asexual reproduction identical or different to the parent(s)? And does this mean that we have variation in the offspring?
c) What is the name of the cell division involved in asexual reproduction?
d) Give 2 advantages of asexual reproduction. Explain your advantages.
e) Give a disadvantage of asexual reproduction. Explain your disadvantage.