What is meant by the term allele?
A gene is made from 1200 base pairs. The table below shows the percentage of each nitrogenous base found in this gene.
| Percentage of base | Name of base |
|---|---|
| 26 | adenine |
| 24 | guanine |
| 26 | (i) [missing base] |
| 24 | cytosine |
Identify the name of the missing base.
Calculate how many cytosine bases you would expect to find in this gene.
In Camellia plants, the inheritance of flower colour is controlled by codominant alleles. The allele for red flowers is FRF^RFR, and the allele for white flowers is FWF^WFW. When a homozygous parent with red flowers is crossed with a homozygous parent with white flowers, all of the offspring have variegated (red and white spotted) flowers.
Give the genotype of each of the following:
Two of the variegated offspring are crossed. What is the probability that their offspring will also have variegated flowers?
