A human bite that breaks the skin is considered a bloodborne pathogen exposure true or false

1 answer:

4 0

TRUE
Human bites may transmit blood borne pathogens(BPS) by exposing the bitters oral mucosa to the bitee's blood and the bite wound to bitters saliva. Consequently bites may require post exposure follow up, since bitter's oral mucosa invariably gets exposed to bitee's blood(reverse exposure), all bitees should be tested for HCV-HIV infectivity.

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What role does natural variation play in the process of natural selection and, ultimately evolution?

xenn [34]

Natural variation provided the phenotypes that natural selection then acted on, over time causing evolution

8 0

3 years ago

Phenylketonuria, PKU, is a single-gene recessive human

astraxan [27]

Answer:

1/2

Explanation:

Let's assume that the allele "p" is responsible for PKU in the homozygous state. According to the given information, both the parents are unaffected by the disorder but have an affected child. This means that both the parents carry at least one copy of the recessive allele responsible for the disease. Therefore, the genotype of each of the parents is Pp. A cross between Pp and Pp would produce progeny in following ratio=

Pp x Pp = 1/4 PP: 1/2/ Pp: 1/4 pp

Therefore, the probability that their next child will carry just one recessive allele is 1/2.