Did Homo sapiens mate with Homo neanderthalensis? What will be an ideal response?
ANSWER: Surprisingly yes, they did. Studies of humans native to regions where H. sapiens and H.
neanderthalensis co-existed thousands of years ago reveal that those populations have
Neanderthal genes within them.
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Many insects make larvae that are very different from the adults. What do you think are advantages of this system? Check all that apply.
_____ Adults and offspring would not compete for food sources. _____ Adults and offspring would not be vulnerable to the same predators. _____ Adults and offspring would not compete for potential mates. _____ Adults and offspring would not compete for habitats.
Some organisms do not have crossing over, and hold their homologous chromosomes together via
some other mechanism. Even though crossing over leads to genetic diversity, the absence of crossing over in these organisms does not prevent the production of diverse gametes. Why is this?
What will be an ideal response?In fragile X syndrome, the fragile X gene contains a nucleotide triplet that repeats 200-1000 times. Indicate whether the statement is true or false
When oxygen became part of the atmosphere, it came from
A. carbon dioxide. B. volcanoes. C. the splitting of water by autotrophs. D. organic molecules.