Draw a genetic diagram to predict the genotypes and phenotypes of the offspring when the cat in Fig. $5.1$ is crossed with a cat heterozygous for the hair length gene and heterozygous for the coat pattern gene. Include: parental phenotypes; parental genotypes; gametes; $F_1$ genotypes; $F_1$ phenotypes.
Researchers isolated two DNA sections thought to match the allele for full colour ($R$) and the allele for pointed ($r$). When these two DNA sections were sequenced, the DNA sequence for full colour, $R$, was found to include a restriction site for the restriction enzyme $\textit{HpaII}$. That restriction site was absent from the DNA sequence $r$ because of a single nucleotide substitution.
Identify evidence in Fig. 5.2 that the pointed phenotype is caused by a recessive allele.
Identify evidence in Fig. 5.2 that shows the $R/r$ gene lies on an autosome.
Identify evidence in Fig. 5.2 that the marker locus and $R/r$ are closely linked.