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kodGreya [7K]
3 years ago
8

A scientist is studying a cross between plants that are heterozygous (Xx) for a certain trait. She will use a table similar to t

his one to make a Punnett square for the cross.
Which percentage of offspring will most likely have the genotype represented by the letter A in this table?
0%
25%
50%
75%

Biology
2 answers:
Inga [223]3 years ago
9 0

Answer:

Option B, 25\\ %

Explanation:

The heterozygous genotype of the parent is Xx

The punnet square for the cross between the two parents having Xx genotype is  

X x

X XX Xx

x Xx xx

Thus,  

A represents the genotype – XX

B represents the genotype – Xx

C represents the genotype – Xx

D represents the genotype – xx

Out of four possible genotypes, XX (A) appears only once.

Thus the probability of occurrence of genotype A (XX) will be  

\frac{1}{4} * 100\\= 25\\ %

ivanzaharov [21]3 years ago
7 0
HM I THINK ITS B 25%
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