Phenotypic characteristics that have a continuous distribution are considered to be ________ traits
Fill in the blank(s) with correct word
quantitative
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Which one of the following is NOT an activity attributed to the checkpoint regulated by the G1/S cyclin-CDK complex in mammals?
A. Protein complexes involved in DNA replication are activated. B. Radiation damage to DNA activates phosphorylation of a p53 protein, preventing its export from the nucleus. C. Excess p53 in the nucleus increases expression of an inhibitor of CDK activity. D. Radiation damage to DNA results in the inhibition of the G1/S cyclin-CDK complex and blocks progression of the cell cycle to S phase. E. Histone expression is inhibited, allowing replication to proceed.
The molecules used as molecular scissors in genetic engineering are
A. exonucleases. B. proteases. C. restriction enzymes. D. RNA polymerases.
Alan Cooper, Cécile Mourer Chauviré, Geoffrey Chambers, Arndt von Haeseler, Allan Wilson and Svante Pääbo investigated the evolutionary relationships among some extinct and living species of flightless birds. They concluded that kiwis are more closely related to African and Australian flightless birds than they are to the moas. What new hypothesis did they propose based on this conclusion?
A. That their data was incorrect and the sample from the museum was corrupted. B. That flightless birds only occurred once in New Zealand. C. That New Zealand was colonized twice by ancestors of flightless birds. D. That the South American species' ancestors flew to New Zealand before the flightless mutation occurred. E. That the North American flightless bird originated from an ancestor of the New Zealand species.
A neuron’s __________ receive signals, and its
__________ transmits signals. Fill in the blank(s) with the appropriate word(s).