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ddd [48]
3 years ago
9

Which part of the cell surrounds the cell and allows molecules in and out this cell part also has holes in it and is said to be

semi permeable?
Biology
1 answer:
mina [271]3 years ago
6 0
That would be the cellular membrane
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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
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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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r  Rr  rr    The genotype ratio is 1:1

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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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