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3 years ago

The ___ chromosome is the sex determiner for many species a. Female b. Male

Biology

2 answers:

suter [353]3 years ago

7 0

Jmale chromosome because it contains X and Y whereas women contains only X and X

swat323 years ago

4 0

Answer:

a. Male

Explanation:

The male chromosome is the sex determiner for many species, because the female chromosome is usually doubled (homozygous). For example, us humans it is XX. However, the male chromosome is usually different (heterozygous). For example, us humans it is XY. Therefore, the mother will always pass, in our case a X chromosome. However, the father can pass either the male determining gene (Y) or the female determining gene (X).

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Dominik [7]

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3 years ago

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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