Association of histone H1 with linker DNA is required to form ____
a. heterochromatin
b. the 10-nm chromatin fiber
c. nucleosomes
d. the solenoid
e. euchromatin
D
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In Down syndrome
a. as the age of the mother increases, the chance of the defect occurring in the unborn children increases. b. the influence of the father on the defect is equal to that of the mother. c. most embryos abort before complete term. d. a person with the defect cannot have a normal child. e. none of these are true.
If the chromosomes crossed over equally, the resulting gametes would likely have the same number of genes.
a. true b. false
Which method often results in colonies developing down throughout the agar and some colonies on the surface?
A. spread plate B. streak plate C. pour plate D. All of these choices are correct.
The presence of ________ can be used to distinguish Staphylococcus from other Gram-positive cocci
A) enterotoxins B) catalase enzyme C) protein M D) kinases E) hemolysins