Answer:
The required answer is given below:
Explanation:
a) Assuming C is the gene for leaf color and S is the gene for the stem type.
then, the genotypes for each parent would be-
Yellow leaves, hairy stem parent: ccSs
Purple leaves, hairy stem parent: CcSs
b) Expected ratios of the progeny as below:
68 yellow leaves, hairy stems: 3/8
66 purple leaves, hairy stems: 3/8
22 purple leaves, smooth stems: 1/8
25 yellow leaves, smooth stems: 1/8
Hence, the ratio is - 3:3:1:1
It might possible that independently assorting single gene pairs could control traits, and that one of the alleles in each pair is dominant.
c) The general formula for calculating X2:
X2 = the sum of (O - E)2/E,
(where O = observed number)
(E = expected number)
So,
(68 – 68)2 /68 + (66 – 68)2/68 + (22 – 23)2 /23 + (25 – 23)2/23
= 0.276
X2 = 0.276
The chi-square statistic too small, Hence the hypothesis is acceptable.
