Problem:
Read each question carefully and answer completely.
Question 1: Discuss the molecular mechanism of an X-inactivation center (Xic) including regulation of maternal and paternal chromosomes.
Question 2: A particular variety of corn has a gene for kernel color and a gene for height with following phenotypes:
CC, Cc (purple kernels) T1T1
Cc (white kernels) T1T2
T2T2
Give the proportions of genotypes and phenotypes produced if a dihybrid is self-fertilized.