Define the term hemizygous and explain how the hemizygous condition relates to sex-linked inheritance. What will be an ideal response?
ANSWER: Because males cannot be homozygous or heterozygous for genes on the X chromosome,
males are said to be hemizygous for all genes on the X chromosome. Traits controlled by
genes on the X chromosome are defined as dominant or recessive by their phenotype in
females. Males give an X chromosome to all daughters and a Y chromosome to all sons.
They never give an X chromosome to any of their sons.
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What is the key concept addressed by the question?
What will be an ideal response?
The greatest threat to the Florida manatees is
a. loss of habitat. b. human predation. c. being mauled or killed by boats. d. stranding in thermal plumes of power plants. e. disease from urban runoff.
A(n) ____ includes the entire genome
a. cDNA library b. transcribed library c. genomic library d. RNA library e. plasmid library
Which soil horizon is composed of organic litter?
a. O Horizon b. A Horizon c. B Horizon d. C Horizon e. Bedrock