Use the information about guinea pigs to complete the tasks that follow Mother
Father
Offspring
Rough coat Smooth coat Rough coat
Short hair
Short hair Short hair
Golden-colored fur
Brown-colored fur
Brown-colored fur
Prefers celery snacks
Prefers carrot snacks
Prefers celery snacks
Does not run on a wheel
Runs on a wheel
Does not run on a wheel
Part A: Why does the offspring most likely have short hair?
Part B: Identify one characteristic of the offspring that is most likely
influenced by the environment.
Part C: Why does the offspring most likely have a rough coat?
Part D: If someone wanted to breed guinea pigs so that they have
golden-colored fur, what would he do?

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?