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.
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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
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
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
If a cell contains only one member of each pair of homologues, it referred to as ________
Fill in the blank(s) with correct word