Biology, 21.05.2020 08:58 alishakira690
In a population of goats, both beige-coated and brown-coated goats are better able to blend with the rocky environment than white-coated goats. In this case, the beige and brown coat colors are favored by natural selection over the white color.
Which type of pattern of natural selection would occur in this scenario?
A. Option 3 shows stabilizing selection.
B. Option 2 shows normal selection.
C. Option 1 shows disruptive selection.
D. Option 4 shows directional selection.
Answers: 1
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Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?
Answers: 1
In a population of goats, both beige-coated and brown-coated goats are better able to blend with the...
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