One unique feature of fertilization in flowering plants compared with animals is that _____
A) only plant sperm are motile
B) fertilization in flowering plants involves double fertilization
C) fertilization in flowering plants does not involve nuclear fusion
D) in flowering plants the gametes are diploid, not haploid as they are in animals
Answer: B
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Replication usually begins in GC rich regions due to the presence of only 2 hydrogen bonds between the bases
Indicate whether the statement is true or false
The process of ____________________ equalizes the dosage of functional genes carried on the X chromosome in males and females
Fill in the blank(s) with correct word
In semiconservative replication of DNA
a. the original double helix remains intact and a new double helix forms. b. the strands of the double helix separate and act as templates for new strands. c. polymerization is catalyzed by RNA polymerase. d. polymerization is catalyzed by a double-helical enzyme. e. DNA is synthesized from amino acids.
Which possible use of reproductive cloning is still considered by most to be an unresolved ethical issue?
A) the production of genetically identical animals for experimentation B) cloning mammals for the production of potentially valuable drugs C) the production of organs in cloned pigs for transplant into humans D) the reproductive cloning of humans