Chapter 5, Problem 24P

A snapdragon with pink petals, black anthers, and long stems was allowed to self-fertilize. From the resulting seeds,

650 adult plants were obtained. The phenotypes of these offspring are listed here.

78 red long tan

26 red short tan

44 red long black

15 red short black

39 pink long tan

13 pink short tan

204 pink long black

68 pink short black

5 white long tan

2 white short tan

117 white long black

39 white short black

a.	Using P for one allele and p for the other, indicate how flower color is inherited.
b.	What numbers of red : pink : white would have been expected among these 650 plants?
c.	How are anther color and stem length inherited?
d.	What was the genotype of the original plant?
e.	Do any of the three genes show independent assortment?
f.	For any genes that are linked, indicate the arrangements of the alleles on the homologous chromosomes in the in the in the original snapdragon, and estimate the distance between the genes.