Download YEAR 10 REVISION – SEMESTER II EXAM

BIOLOGY Sem 2 Topic Test 2013 - REVISION
Use the following family tree for hemophilia, a sex linked trait, to answer question 1.
I
1
II
III
1
2
2
1
2
3
4
5
3
6
4
1. Is the condition dominant or recessive? Give the evidence for your answer.
2. Write down the genotypes for each individual. If it cannot be determined, write all possibilities.
3. If individual III2 married a carrier female, what are the chances that they would produce an offspring
that would suffer from hemophilia? What is the chance that a son would suffer? What is the chance that a
daughter would suffer?
4. The following list has the steps in natural selection jumbled. Un-jumble them into the correct order.
i.
The environment changes which causes some
vi.
Variation in the gene pool
individuals to die
vii.
The individuals that are benefited by
ii.
A greater proportion of the population
their beneficial genes survive to a
now contain the beneficial genes
reproductive age.
iii.
Mutations that occur in a species leads to
viii.
The beneficial genes are passed on to
iv.
If the environment changes in the same
the next generation.
way in the future as it did in the past then
ix.
This has led to the species evolving
less individuals of the population will die out
v.
A few individuals contain beneficial genes
that help them survive the environmental change
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
Draw a labeled diagram to explain how cloning of an animal is achieved.
What is gene splicing and how does it relate to the use of insulin for diabetics?
What does IVF stand for?
Name three issues relating to the use of IVF.
Give the 5 steps required for a cycle of IVF treatment
What does the term mutation mean?
What are the two causes of mutations?
Give three examples of mutations and state whether they are beneficial or detrimental
What genetic disorder is caused by i) too many body chromosomes ii)having an extra X chromosome in a
female and a male and iii) having only one X chromosome
What is the cause behind the above disorders? Draw a diagram showing how these can occur in an
individual.
Rabbits are a pest in Australia. The rabbit proof fence was one attempt at controlling the spread of
rabbits. What was the other?
Describe why, after many generations, rabbits are now much more resistant to your answer to Q15.
Show, using a graph how the population of rabbits would have changed over time, starting from just before
the introduction of the control measure from Q15.
Provide one argument for, and one against GM foods.
What is meant by the term ‘genetic screening’ and how could it benefit parents?
20. The above pedigree chart is for a dominant/recessive type of inheritance pattern. Is the shaded
characteristic dominant or recessive? How can you tell?
21. using G and g for the alleles, what is the genotype of individuals 5, 10 and 13
22. Determine the genotypic ratio for the predicted offspring of individuals 3 and 4.
23. Using a punnet square, determine the % chance of a married couple having a son.
Planet Boop is filed with lush pink plants. There lives a population of Babbits (which look like a rabbit, but have
a few differences). Babbits are mostly blue, but some Babbits are pink. Most have short necks, but some have
elongated necks. They have looked this way for thousands of years.
24. Some Quolves (which look like wolves and eat Babbits) are introduced to the area the Babbits inhabit. How
and why does the allele frequency change in the Babbit population?
25. A flood washes away all the low lying pink grasses the Babbits generally eat. How and why does the allele
frequency change in the Babbit population?
26. A population of purely green Boths (which look like sloths) are also preyed upon by the introduced Quolves.
Choose the most likely outcome of the Dares:
i.
They will mutate to have pink fur, camouflage and survive
ii.
They will die out due to being easy and slow moving prey
iii.
They will adapt by natural selection and survive
27. Explain why the other two choices will not occur.