There is a phenomenon called parental leakage, in which a small amount of the mitochondrial DNA from the father is found in the offspring
If parental leakage is assumed to
have occurred throughout human history, how does it change our interpretation of Matthias
Krings and Svante Päabo's studies of mitochondrial DNA in specimens of Neanderthals and
modern humans?
A. If the paternal mitochondrial DNA did show
up in the offspring alongside maternal
mitochondrial DNA, these would have
immediately indicated that the two groups
interbred.
B. The results would have been exactly the
same because researchers were looking at
only female modern humans in this study.
C. Mitochondrial DNA coming from the father
would negate all of the advantages of using
mtDNA as the source for genetic information
in the first place, so the whole study would be
useless.
D. The results would have been exactly the
same because researchers were looking at
only modern humans that were males for this
study. This means it wouldn't have mattered if
paternal leakage occurred or not.
A
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They might be conducting such an experiment to _____
A) find the location of a particular gene in the human genome B) prepare to isolate the chromosome on which a particular gene of interest C) find which of the students has which alleles D) measure the expression of one or more genes in their genomes E) determine if any of them carries an extra sex chromosome
In frog embryos, the blastopore becomes the _____
A) anus B) ears C) eyes D) nose E) mouth
To experimentally determine the function of an annotated gene, a researcher may _____
a. look for similar gene sequences of known function b. examine the putative protein structure c. perform a gene knockout d. find a pseudogene for the gene e. determine the amino acid sequence
After formation, an asteroid could produce an iron core and a rocky silicate mantle if it melted then
a. differentiated. b. outgassed. c. condensed. d. accreted. e. sublimed.