In meiosis, sister chromatids separate
a. before DNA replication.
b. before crossing over.
c. during Anaphase I.
d. during Anaphase II.
e. never; sister chromatids do not separate in meiosis.
D
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At the beginning of this century there was a general announcement regarding the sequencing of the human genome and the genomes of many other multicellular eukaryotes. Many people were surprised that the number of protein-coding sequences was much smaller
than they had expected. Which of the following could account for much of the DNA that is not coding for proteins? A) most of the DNA serving as origins of DNA replication B) DNA that consists of histone coding sequences C) DNA that is translated directly without being transcribed D) non-protein-coding DNA that is transcribed into several kinds of small RNAs with biological function E) non-protein-coding DNA that serves as binding sites for reverse transcriptase
The main role of the liver is to ________.
A. produce bile, which helps the process of digestion B. absorb nutrients C. break large food into smaller food bits D. absorb water
The dominant phenotype can be produced by which of the following?
a) Rr only b) Both RR and Rr c) RR only d) Both Rr and rr e) rr only
Unlike white blood cells, mature red blood cells lack a(n) ________
Fill in the blank(s) with correct word