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#Question id: 5220

In comparing the genomes of humans and those of other higher primates, it is seen that humans have a large metacentric pair we call chromosome #2 among our 46 chromosomes, while the other primates of this group have 48 chromosomes and any pair like the human #2 pair is not present; instead the primate groups each have two pairs of midsize acrocentric chromosomes. What is the most likely explanation?

#SCPH28 | Zoology

  1. The ancestral organism had 48 chromosomes and at some point a centric fusion event occurred and provided some selective advantage.

  2. The ancestral organism had 46 chromosomes, but primates evolved when one of the pairs broke in half.

  3. At some point in evolution, human ancestors and primate ancestors were able to mate and produce fertile offspring, making a new species.

  4. Chromosome breakage results in additional centromeres being made in order for meiosis to proceed successfully.

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TLS Online TPP Program

#Question id: 3872

#SCPH28 | Zoology

Processing of a primary mRNA transcript in a eukaryotic cell does not normally involve:
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#Question id: 1101

#SCPH28 | Zoology

The activity of adenylyl cyclase is essentially the opposite of which of the following enzymes?
TLS Online TPP Program

#Question id: 349

#SCPH05 I Biotechnology

Increased atmospheric CO2 concentrations might have what effect on seawater?
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#Question id: 1021

#SCPH06 I Botany

Disease Control (CDC) determine that the agent causing the birds to die is the West Nile virus. Outbreaks of this illness have been observed in several other countries in Asia and the Middle East across the last 50 years, but not in the United States. With this information, what would be the best categorization of this infectious agent/disease
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#Question id: 1083

#SCPH01 Biochemistry

 When a neuron responds to a particular neurotransmitter by opening gated ion channels, the neurotransmitter is serving as which part of the signal pathway?