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Romashka [77]
3 years ago
13

Why is the inoculating loop flamed before streaking a new sections of the medium?

Biology
1 answer:
Norma-Jean [14]3 years ago
6 0

The  inoculating loop is used as a tool to inoculate microbes on plates. So it is necessary to flame the inoculating loop to destroy any kind of microorganisms that may contaminate ou interfer the culture medium. The fire, together with ethanol, helps to sterilize the loop, allowing it to inoculate a pure culture.

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In humans, the trait for tongue rolling is dominant over the trait for the inability of a human to roll his/her tongue. If a het
MrMuchimi

50 percent of the offspring would be expected to have the ability to roll their tongues If a heterozygous male is crossed with a homozygous recessive female.

Explanation:

Information given:

the ability to roll tongue is dominant, the genotype would be RR, Rr

the inability to roll tongue is recessive trait the genotype = rr

Given that heterozygous male is crossed with homozygous recessive female, the genotype is

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Punnet square shows that:

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There are chances of 50 % offspring having the ability to roll their tongues as they are heterozygous and have the dominant allele for rolling of tongues.

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3 years ago
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Hope this helps! :)

P.s. This question seems more of a Chemistry than Biology question in my opinion
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