Of nearly 200 forms of hereditary deafness, 132 are autosomal recessive, 64 autosomal dominant, and 4 X-linked recessive. Hereditary deafness is therefore genetically

A) heterozygous.

B) heterogeneous.

C) heterogametic.

D) heterosexual.


B) heterogeneous.

Biology & Microbiology

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______ are the only vertebrates in which blood flows directly from respiratory organs to body tissues without first returning to the heart.

A. Amphibians B. Birds C. Fishes D. Mammals E. Reptiles

Biology & Microbiology

Which of the following types of bonds require electrons to be shared between atoms?

a. non-polar covalent only b. polar covalent only c. ionic only d. both polar and non-polar covalent

Biology & Microbiology

Which of the following is found in every nucleotide?

a. ribose b. a single phosphate group c. a single carbon ring d. a double nitrogen ring e. nitrogen

Biology & Microbiology

If a cell contains only one member of each pair of homologues, it referred to as ________

Fill in the blank(s) with correct word

Biology & Microbiology