In a wild-type strain of fruit flies, the length of a gene from the start to the stop codon is 2,000 DNA bases. Suppose an experiment indicated that the mRNA molecule transcribed from this gene is much shorter (only 1,200 bases)
What is the most likely explanation for this?
A) There are introns in the DNA that were cut out of the mRNA.
B) The mRNA was prematurely degraded.
C) A mutation caused the formation of an extra stop codon in the gene.
D) The first 800 bases of DNA are always cut out as it is transcribed into mRNA.
A
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In comparison to rocky coasts, intertidal organisms living on sandy or muddy beaches
A) experience greater variability in salinity. B) experience greater variability in temperature. C) are more likely to be attached to the substrate. D) are more likely to move back and forth with the tides.
The synthesis of thyroglobulin takes place inside
a) Follicle Cell b) Folliclar Lumen c) Follicle axis d) Follicle Pitutary axis e) Follicle anterior axis
When the homologous chromosomes separate during meiosis I, each daughter nucleus receives
What will be an ideal response?
What is a testcross?
A. a cross between two organisms of different species B. a cross between an organism of unknown genotype with a homozygous recessive individual C. any genetics cross you do in order to test a hypothesis D. a cross between two true-breeding individuals (such as we see in the P generation) E. any genetics cross you see on an exam