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Len [333]
3 years ago
9

During an action potential, which of the following changes significantly? Group of answer choices

Biology
1 answer:
tino4ka555 [31]3 years ago
4 0

The process is ocurring by steps, starting with depolarization.

1- Na+ permeability > K+ permeability

2- Vm (membrane potential) approaches ENa+ (quilibrium potential for potassium)

3- K+ permeability > Na+ permeability

4- Vm (membrane potential) approaches EK+ (quilibrium potential for potassium)

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In chickens, comb shape is determined by genes at two loci (R, r and P, p). A walnut comb is produced when at least one dominant
mariarad [96]

Answer:

in the obtained options, there is no dominant gene for the crossed pairs, therefore, no answer would be correct, however, when assigning a dominant character to the P gene, the correct answer would be:

E. Rr pp *rrPp

Explanation:

According to the information obtained we deduce:

Comb shape is produced by R and P

Comb of walnuts with an R or a P

Pink comb: 1 dominant P and R at the first locus and 2 recessive at the next locus

Pea comb: 2 recessive at the start and one dominant in the next position

1 single comb: 2 recessive at both loci

Rr pp × rr Pp will produce from the interbreeding: 2 walnuts, 1 single and 1 pea offspring.

We deduce that for the pink comb the genotype is: Rrpp

and for the pea comb it is rrPp

Rr pp × rr Pp generates crosslinks containing RrPp, rrPp, rrpp as children in a 2: 1: 1 ratio.

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