If a human diploid cell and a human haploid cell somehow managed to fuse together and not lose any of the chromosomes, how many sets of chromosomes would be inside the newly formed cell?
A. 1.5
B. 3
C. 2
D. 2.5
Answer: B
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Imagine that you are studying the control of ?-globin gene expression in immature red blood cells . (Mature red blood cells contain ?-globin protein but lack a nucleus and, therefore, the ?-globin gene.)
If you deleted a sequence of DNA outside the protein-coding region of the ?-globin gene and found that this increased the rate of transcription, the deleted sequence likely functions as _____. A) a promoter B) a promoter-proximal element C) an enhancer D) a silencer E) any of the listed functions
Leukemia is often associated with chromosomal translocations
a. True b. False Indicate whether the statement is true or false
The multicellular sex organs in plants are known as:
a. gametes. b. spores. c. gametangia. d. fruits. e. sperm.
Whether a cell lives or dies after a particular event depends to a large degree on ________ between ________ and _________ signals.
a) the balance, mitotic, cytokinetic b) the balance, proapoptotic, antiapoptotic c) the differences, on, off d) the differences, mitotic, cytokinetic e) the similarities, proapoptotic, antiapoptotic