Which is an example of a quantitative trait?
A. People who are homozygous for the group of genes associated with skin pigment have either lighter or darker skin than those who are heterozygous for those genes.
B. The alleles of the gene for red hair color is masked by the gene for brown hair color.
C. A person heterozygous for dwarfism will always have the dwarf phenotype.
D. A woman who has one allele for color blindness will not be color blind, but a man who has one allele for color blindness will be color blind.
E. 25% of the offspring from a cross of two fruit flies that are heterozygous for curly wings will have curly wings.
A. People who are homozygous for the group of genes associated with skin pigment have either lighter or darker skin than those who are heterozygous for those genes.
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The process illustrated in the figure is a step in
a. the production of recombinant DNA. b. probing for transferred genes. c. DNA fingerprinting. d. sequencing DNA. e. producing radioactive probes.
The initial carrying capacity of an environment
is indicated by a. A. b. B. c. C. d. D. e. E.
There is a __________ flow of energy into and out of an ecosystem, and a cycling of materials among
resident species. Fill in the blank(s) with the appropriate word(s).
In a woman’s monthly cycle, the hormone _____ is released when estrogen reaches a peak
a. luteinizing hormone b. oxytocin c. progesterone d. testosterone e. human chorionic gonadotrophin