Eyelash length is an inherited trait. In the human population, there is an eyelash length gene. There are two possible variants of this gene - an allele for long eyelashes (> 1cm) and an allele for short eyelashes (1 cm or less). How many eyelash length alleles does an individual have in one of her/his somatic cells?
A. 46
B. 23
C. 2
D. 3
E. 1
C. 2
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A mutant allele results in a truncated form of a signaling protein. This protein can still bind its receptor protein but does not activate the receptor and inhibits wild-type signaling proteins from binding the receptor. What type of allele is this mutant allele?
A) hypomorphic allele B) hypermorphic allele C) neomorphic allele D) antimorphic allele
What is the hormone that stimulates the bone marrow to produce more red blood cells, as in the case of a hemorrhage?
a. ANH b. TSH c. BSH d. erythropoietin e. renin
A polysaccharide that is used for storing energy in human muscle and liver cells is _____.
A. glucose B. glycogen C. starch D. chitin E. cellulose
DiGeorge syndrome is
A. Characterized by a goiter B. A defect of phagocytic cells C. Characterized by cytotoxic reactions D. Immune deficiency diseases E. Forms of type I hypersensitivity