A mother is a carrier for blue eyes (autosomal recessive) and for hemophilia (X-linked recessive). Which of these is a correct statement?
A) All sons will have blue eyes and be hemophiliacs.
B) The phenotype depends on the father's genotype as to whether the sons will have blue eyes and/or be hemophiliacs.
C) The father's genotype can determine whether a son has blue eyes but will not determine whether a son will be a hemophiliac.
D) Regardless of the father, no sons will have blue eyes or be hemophiliacs.
E) Regardless of the father, the mother can only pass on blue eyes to her daughters and hemophilia to her sons.
Ans: C) The father's genotype can determine whether a son has blue eyes but will not determine whether a son will be a hemophiliac.
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Chromosomes are often represented as an X, with two sister chromatids attached at the centromere. Do chromosomes always look like an X?
A. No, chromosomes only look like an X following DNA replication, and before cell division; the rest of the time, they only have one sister chromatid each. B. No, chromosomes only look like an X right after cell division; the rest of the time, they have only one sister chromatid each. C. Yes, chromosomes are always made up of two sister chromatids attached. D. No, chromosomes only look like an X when condensed, but they always have two sister chromatids attached.
The gut is lined with epithelial cells with ____________________ that connect the plasma membranes of adjacent cells.
Fill in the blank(s) with the appropriate word(s).
Virulence refers to the ability of an organism to cause disease
Indicate whether the statement is true or false.
RNA polymerase is called a ________, meaning it is an intact complex with full enzymatic capacity
Fill in the blank(s) with correct word