‘CC’ for Carbon Copy is the name of the first cloned kitten born in 2001 - VCE - SSCE Biology - Question 5 - 2006 - Paper 1
Question 5
‘CC’ for Carbon Copy is the name of the first cloned kitten born in 2001. The nucleus of a cat’s egg cell was removed. It was replaced by a nucleus from a somatic ce... show full transcript
Worked Solution & Example Answer:‘CC’ for Carbon Copy is the name of the first cloned kitten born in 2001 - VCE - SSCE Biology - Question 5 - 2006 - Paper 1
Step 1
What is meant by the term cloning?
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Answer
Cloning refers to the process of creating genetically identical copies of an organism. This can involve various methods, such as somatic cell nuclear transfer, where the nucleus of a donor cell is inserted into an egg cell that has had its own nucleus removed, leading to the development of an organism that is a genetic replica of the donor.
Step 2
How many chromosomes would have been in the nucleus that was removed from the egg cell?
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Answer
The nucleus that was removed from the egg cell would contain 38 chromosomes, which is the diploid number for a cat.
Step 3
Is CC male or female? Explain.
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CC is female because the donor of the nucleus was from the somatic cell of a female cat. Since the nucleus contains the genetic material that determines sex, CC inherits the female genetic makeup.
Step 4
Suggest a reason for the two values of DNA, for example, 164/164.
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The two values in the DNA indicate that for each specific region, both alleles are identical, which suggests that the individual is homozygous for those loci. This can occur when both alleles inherited from the parents are the same, or it may indicate that both DNA samples from CC and the donor are genetically identical.
