Question

1.4 assessment
match each term on the left with the best description on the right. each description may
be used only once.

1. genetic variation

a. type of reproduction that requires one parent

1. sexual reproduction

b. type of reproduction that requires two parents

1. asexual reproduction

c. dna sequences are different for each individual in a species
circle the letter of the best answer for questions 4 to 10.

1. asexual reproduction requires

a. two parents.
c. only one parent.
b. two gametes.
d. only one gamete.

1. which of the following is an advantage of asexual reproduction?

a. it occurs really slowly
b. it allows the population to grow rapidly
c. it takes time for the offspring to mature before they can reproduce
d. it allows the parents to pass on 50% of their genetic material to their offspring

1. a lack of genetic diversity from asexual reproduction means that

a. all the gametes are clones of each other.
b. all the offspring are genetically identical to each other.
c. the offspring did not inherit any genetic materials from the parents.
d. the population have individuals with different combinations of dna sequences.

1. a deadly fungal disease hit an apple orchard that was grown by asexual

reproduction using grafting. what would you expect to happen to the rest of the
crop if one apple tree was vulnerable to that disease?
a. all the apple trees would grow rapidly, producing more apples.
b. all the other apple trees would be resistant to the fungal disease.
c. all the other apple trees would adapt so that they could survive the disease.
d. all the other apple trees would be equally vulnerable to the disease and could be
wiped out.

Explanation:

• Question 1 - 3:
• Genetic variation means DNA sequences are different for each individual in a species. Sexual reproduction requires two parents. Asexual reproduction requires one parent.
• Question 4:
• Asexual reproduction is a type of reproduction that requires only one parent.
• Question 5:
• One advantage of asexual reproduction is that it allows the population to grow rapidly as it doesn't involve complex mating and fertilization processes like sexual reproduction.
• Question 6:
• In asexual reproduction, offspring are produced from a single parent (by mitosis - like processes in many cases). So all the offspring are genetically identical to each other (clones).
• Question 7:
• Since the apple orchard was grown by asexual reproduction (grafting), all the apple trees are genetically identical. If one is vulnerable to the disease, all are equally vulnerable.

Answer:

1. C. DNA sequences are different for each individual in a species
2. B. type of reproduction that requires two parents
3. A. type of reproduction that requires one parent
4. C. only one parent
5. B. it allows the population to grow rapidly
6. B. all the offspring are genetically identical to each other
7. D. All the other apple trees would be equally vulnerable to the disease and could be wiped out.