Albinism in mice is a genetic condition where the mouse lacks pigment, resulting in a white coat and red eyes. This recessive trait is caused by the allele aaa. Normal coat pigmentation is the dominant phenotype, caused by the allele AAA.
Complete the table below by identifying the missing genotype name, alleles, or phenotype (normal or albino) for each row:
| Genotype | Alleles | Coat Type |
|---|---|---|
| heterozygous | (i) | normal |
| (ii) | aa | (iii) |
| homozygous dominant | AA | (iv) |
The table below lists possible genetic crosses between parents. Complete the table by determining the probability (as a decimal) of each cross producing an offspring with an albino coat. One has been done for you.
| Parent genotypes | Probability of offspring with an albino coat |
|---|---|
| Aa×AAAa \times AAAa×AA | (v) |
| Aa×aaAa \times aaAa×aa | 0.5 |
| Aa×AaAa \times AaAa×Aa | (vi) |
