BIOLOGYIn the tiny model plant Arabidopsis, the recessive allele hyg confers seed resistance to the drug hygromycin, and her, a recessive allele of a different gene, confers seed resistance to herbicide. A plant that was homozygous
$$
\text {hyg/hyg. her/her }
$$
was crossed with wild type, and the
$$
F_1
$$
was selfed. Seeds resulting from the
$$
F_1
$$
self were placed on petri dishes containing hygromycin and herbicide. a. If the two genes are unlinked, what percentage of seeds are expected to grow? b. In fact, 13 percent of the seeds grew. Does this per- centage support the hypothesis of no linkage? Explain. If not, calculate the number of map units between the loci. c. Under your hypothesis, if the
$$
F_1
$$
is testcrossed, what proportion of seeds will grow on the medium containing hygromycin and herbicide?