During meiosis I, homologous chromosomes undergo chiasma formation. Which of the following can happen now when the homologous chromosomes synapse or contact each other?
a. Homologous chromosomes can undergo a process by which random proteins are made
via independent assortment.
b. Homologous chromosomes can exchange arms with one another via DNA replication.
c. Homologous chromosomes can undergo a process by which identical characteristics are
simultaneously expressed.
d. Homologous chromosomes can exchange arms with one another via homologous recombination.
d. Homologous chromosomes can exchange arms with one another via homologous recombination.
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__________ are open channels that connect the
cytoplasm of abutting cells and permit rapid transfer of ions and small molecules between them. Fill in the blank(s) with the appropriate word(s).
Phagocytosis is
A. an example of exocytosis. B. an example of passive transport. C. an example of diffusion. D. an example of endocytosis. E. an example of facilitated diffusion.
One goal of the Human Genome Project was to sequence the ____________________ (number of) chromosomes in the human genome, including all autosomes and the sex chromosomes
Fill in the blank(s) with correct word
Of all the different codons that exist, three of them
a. are involved in mutations. b. do not specify a particular amino acid. c. cannot be copied. d. provide instructions such as STOP. e. do not specify a particular amino acid and provide instructions such as STOP.