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boyakko [2]
3 years ago
5

When does cell differentiation occur?

Biology
2 answers:
frutty [35]3 years ago
8 0
Most animal cells differentiate at an early stage

dedylja [7]3 years ago
6 0

Answer:

when cells do not express genes

Explanation:

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If t=talk and t= short what will be the physical appearance of the offspring in the cross
qwelly [4]

Answer:

If T=tall and t=short, what will be the physical appearance of the offspring in the cross?

Explanation:

It looks like your question is incomplete, so I'll try to fill in the blanks.

The offspring will depend on the parents.  Each parent will need two alleles, so each parent would have to be TT (tall), Tt (tall) or tt (short--this is the only way to have a short individual).

Here are all the possible crosses:

TT X TT  = 100% TT (all tall)

TT X Tt = 50% TT, 50% Tt (all tall)

TT X tt = 100% Tt (all tall)

Tt X Tt = 25% TT (tall), 50% Tt (tall), 25% tt (short)

tt X tt = 100% tt (short)

Note that if there is a T present in the genotype (TT or Tt), that individual will be tall.  The only way to produce short offspring is for the both parents to have a copy of the short allele (t).  

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What does X represent in this model?
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X represent light energy
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A mutation that causes a patch of white hair on a person's head when the rest of his hair is brown is most likely a
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Explain two mechanisms by which resistant bacteria are genetically different from non-resistant bacteria. Justify the difference
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There are a number of mechanisms through which a bacterial cell might become resistant to a specific antibody.

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