Chorionic villus sampling reveals a fetus has the karyotype 47, XYY. What is the diagnosis?
A) Normal female
B) Klinefelter syndrome
C) Edward syndrome
D) Jacobs syndrome
A) Normal female
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What do the colors in in the figure below likely represent?
A. nothing, they are just there to make the chromosomes look nice. B. the presence of different genes along the length of DNA. C. the presence of different histone proteins in the chromatin. D. different levels of packaging and condensation of the chromatin.
A pregnant mouse is exposed to high levels of a chemical. many of the mice in her little are deformed, but when they are interbred with each other, all their offspring are normal. Which TWO of the following statements could explain these results?
(a) In the deformed mice, somatic cells but not germ cells were mutated. (b) The original mouse's germ cells were mutated. (c) In the deformed mice, germ cells but not somatic cells were mutated. (d) The toxic chemical affects development but is not mutagenic.
The majority of cases of pneumonia are caused by
A) Mycoplasma pneumoniae. B) Klebsiella pneumoniae. C) Haemophilus influenzae. D) Streptococcus pneumoniae. E) Chlamydophila pneumoniae.
The Mars rover Curiosity finds a living organism on the red planet. Scientists would know that it is eukaryotic and not prokaryotic if ________
A) it has membrane-bound organelles B) its diameter is 10 ?m C) it has six internal membranes D) it has a cytoskeleton