SSCE VCE Biology Mechanisms of Inheritance: In phlox plants (Phlox drummondi

Question

In phlox plants (Phlox drummondii) a gene locus produces the enzyme alcohol dehydrogenase. There are two alleles at this locus, A1 and A2, each producing a different form of the enzyme. A heterozygote can produce both forms of the enzyme.

Fifty plants were sampled to see which enzyme was produced. The results are shown below.

| genotype based on enzyme produced | A1A1 | A1A2 | A2A2 |
|-----------------------------------|------|------|------|
| number of plants of each genotype  |  20  |  10  |  20  |

From the data above it is possible to conclude that:
A.  the total number of A2 alleles is 30.
B.  the frequency of the A1 allele is 0.3.
C.  the frequency of the A2 allele is 0.3.
D.  there are a total of 50 alleles in this population.

In phlox plants (Phlox drummondii) a gene locus produces the enzyme alcohol dehydrogenase - VCE - SSCE Biology - Question 20 - 2005 - Paper 1

Worked Solution & Example Answer:In phlox plants (Phlox drummondii) a gene locus produces the enzyme alcohol dehydrogenase - VCE - SSCE Biology - Question 20 - 2005 - Paper 1

D. there are a total of 50 alleles in this population.

Join the SSCE students using SimpleStudy...