35.Epigenetic modifications of the genome (A) only one Y chromosome is active in female mammals. (B)heterochromatin sciences nearby genes. (C)one of the two X chromosomes in female mammals is accurately inactivated to achieve proper gene dosage. (D) DNA methylation is a heritable mark on the DNA. (E) DNA methylation decreases the rate of mutation.

8. Which are the characteristics of genetic analysis? (A) Some of alleles can exhibit both recessive and dominant properties. (B) Dominant alleles are often the consequence of a mutation that causes some kind of gain of function. (C)Dominant mutations in certain genes are associated with a loss of function. (D)Dominant negative produces a phenotype similar to that obtained from a loss-of function mutation. (E)Recessive and dominant mutant alleles generally have opposite effects on gene function.

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