NSWTR 2024 HR - Flipbook - Page 56
YEAR 9-10 SECTION
RESULTS
Data Table – Comparison of koala DNA sequences
NUMBER OF DNA BASES DIFFERENT TO KIKI
MALE 1
MALE 2
MALE 3
MALE 4
5
DISCUSSION QUESTIONS
1. A change in the DNA bases is known as a gene
m_____________________
2. Using the DNA evidence available, which male is most
genetically similar to Kiki?
3. Using the DNA evidence available, which male is most genetically
di昀昀erent to Kiki?
Scenario 1 – All animals in the same enclosure select
their own mates.
4. Kiki breeds with Male 1, who is her favourite. But is he the
best genetic match for the future of the species? Explain why
or why not.
Scenario 2 – Scientists set up a breeding program for the
koalas in the enclosure.
5. The scientist in charge of a selective breeding program chooses
Male 3 as a genetic partner for Kiki. Do you think this is a good
choice for encouraging greater genetic diversity in the species?
Why or why not?
6. How can breeding programs help species maintain or increase
genetic diversity over many generations? Give some examples
in your response.
7. Male 4 is a close relative of Male 1. What evidence in their DNA
sequence suggests this?
8. A second female koala at the wildlife sanctuary, Lillie, has the
following DNA sequence:
TAC GGA GTC GAT TAT CGT CCA TAT GAT CTT
Which male would make a suitable breeding partner for Lillie in
order to maximise genetic variability in their o昀昀spring?
9. Why are breeding programs valuable in regards to increasing
species diversity?
10. Explain to someone who doesn’t know about the genetic
technology DNA sequencing how it has helped set up successful
breeding programs in zoos, sanctuaries and wildlife parks that
increase genetic diversity.
SPECIES SURVIVAL – MORE THAN JUST SUSTAINABILITY
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