Perhaps the greatest asset possessed by early
hominins was
a. their use of many different kinds of foods.
b. the ability to walk without using the
forelimbs.
c. a heavy, muscular build.
d. the ability to reason and learn.
e. less hair on the body.
D
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Which of the following statements about independent assortment and segregation is correct?
A) The law of independent assortment requires describing two or more genes relative to one another. B) The law of segregation requires describing two or more genes relative to one another. C) The law of segregation requires having two or more generations to describe. D) The law of independent assortment is accounted for by observations of prophase I. E) The law of segregation is accounted for by anaphase of mitosis.
In the United States, most newborns undergo a screening test for up to 60 genetic disorders. A few drops of blood is taken from each baby and the levels of various blood components are determined. The screening identifies babies who might have a genetic disorder, but is not diagnostic. Further testing is required if the screen shows a blood component is out of the normal range. Which of the following technologies could potentially be a low-cost replacement for the current newborn screening and would directly test most babies for the presence of many genetic disorders?
A) PCR to amplify the PKU gene B) exome sequencing and comparison with known mutations in databases C) DNA fingerprinting using CODIS SSRs D) preimplantation genetic diagnosis
Which structures have the same length, shape, and centromere location?
a. karyotypes b. histones c. bacteriophages d. nucleosomes e. autosome pairs
Oxygen-poor blood circulates through
a. A. b. B. c. C. d. D. e. A, C, and E.