What are the three structures that add secretions to the sperm to make up semen?
A) seminal vesicles, Leydig cells, and prostate gland
B) prostate gland, seminal vesicles, and seminiferous tubules
C) bulbourethral glands, Leydig cells, and seminal vesicles
D) seminal vesicles, prostate gland, and bulbourethral gland
D
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In the Hershey-Chase experiments, the protein coat of the bacteriophage was labeled with the 32P radioisotope
Indicate whether the statement is true or false
Short index fingers (shorter than the ring finger) are dominant in males and recessive in females, whereas long index
fingers (as long as or longer than ring fingers) are dominant in females and recessive in males. Give the F2 genotype and phenotype resulting from the cross of a male with long index fingers with a female with short index fingers. What will be an ideal response?
In transcription, RNA polymerase binds to a
__________ in the DNA near a gene, and then assembles a strand of RNA. Fill in the blank(s) with the appropriate word(s).
Small circular molecules of “extra” DNA in bacteria
a. are plasmids. b. are DNA fragments from their main chromosome. c. result from the activity of restriction enzymes. d. are eventually degraded. e. are none of these.