Mendel selected 7 traits in pea plants to study. What was lucky about this choice?
a. Peas are easy to raise and have short life cycles.
b. All 7 traits were easy to characterize.
c. The 7 alleles segregated independently from each other.
d. He knew enough mathematics to apply rules of probability to his results.
e. The 7 traits were all located on the same plant chromosome.
C
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Suppose that an induced mutation removes most of the end of the UTR of an mRNA. What is most likely to happen?
A) Removal of the UTR will have no effect because the exons are still maintained. B) Removal of the UTR also removes the 5' cap and the mRNA will quickly degrade. C) The UTR will duplicate and one copy will replace the end. D) The first exon will not be read because I1 will now serve as the UTR.
Down syndrome involves trisomy
a. 3. b. 5. c. 15. d. 19. e. 21.
The respiration rate of homeotherms is proportional to
A) air pressure. B) body temperature. C) body size. D) environmental temperature.
It is estimated that the modern continents began to take shape
A) 45 million years ago. B) 250 million years ago. C) 66 million years ago. D) 600 million years ago.