In a species of grass, height is determined by 5 genes. Each gene has two allele
ID: 176516 • Letter: I
Question
In a species of grass, height is determined by 5 genes. Each gene has two alleles, one allele contributes 2cm to plant height and the other is non-contributing (adds 0 cm to height). Plants with the genotype aabbccddee are 12cm tall (all alleles noncontributing), while plants with the genotype AABBCCDDEE are 32cm tall (all alleles contributing). a. If you cross aabbccddee x AABBCCDDEE, what will be the height of the progeny? b. If you cross the F1 from above to itself, what proportion of the F2 progeny will be 20cm tall? c. What proportion of the F2 progeny will be 12cm?Explanation / Answer
1. Height of the progeny will be 22 cm
When cross aabbccddee x AABBCCDDEE
F1 progeny will be AaBbCcDdEe
Here aabbccddee have height 12 cm without contributing means 12 + 10 other 5 allele contribute 2 cm height so the height of F1 progeny will be 22 cm.
3) 1out of total progeny only will be 12 cm. Those progeny have aabbccddee genotype.