Which of the following statements is true?
A) The term expressivity defines the percentage of individuals who show at least some degree of expression of a mutant genotype.
B) Penetrance specifically refers to the expression of lethal genes in heterozygotes.
C) Genomic anticipation refers to observations that a genetic disorder occurs at an earlier age in successive generations, whereas genetic imprinting occurs when gene expression varies depending on parental origin.
D) Expressivity is the term used to describe the balanced genetic output from a hemizygous condition.
E) Genomic imprinting occurs when one allele converts another.
Answer: C
You might also like to view...
Following reports that stained chromosomes "disappeared" while observing cell division, scientists in the early 1900s determined the molecule of heredity to be
A) DNA. B) RNA. C) protein. D) lipids. E) carbohydrates.
A chromosome with two arms of similar length is referred to as
A) acrocentric. B) homologous. C) telocentric. D) metazoan. E) metacentric.
During sperm formation the cell type that divides by mitosis is the ____
a. primary spermatocyte b. secondary spermatocyte c. polar body d. polar body e. spermatids
The transport of large molecules into the cell, across the membrane, is accomplished via:
A) passive transport. B) endocytosis. C) active transport. D) facilitated diffusion. E) exocytosis.