The number of autosomes in this karyotype is
A - VCE - SSCE Biology - Question 1 - 2008 - Paper 1
Question 1
The number of autosomes in this karyotype is
A. 22
B. 23
C. 44
D. 46
Worked Solution & Example Answer:The number of autosomes in this karyotype is
A - VCE - SSCE Biology - Question 1 - 2008 - Paper 1
Step 1
Identify the number of chromosomes in the karyotype
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Answer
To determine the number of autosomes, we first need to know the total number of chromosomes present in the karyotype. In a normal human karyotype, there are 46 chromosomes total, comprised of 22 pairs of autosomes and one pair of sex chromosomes.
Step 2
Determine the number of autosomes
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Answer
Since there are 46 chromosomes in total and only 2 are sex chromosomes, the number of autosomes can be calculated as follows:
Total chromosomes = 46
Sex chromosomes = 2 (XX or XY)
Therefore, the number of autosomes = 46 - 2 = 44.
Step 3
Select the correct option
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Answer
From the options provided, the number of autosomes is 44, which corresponds to option C.
