Question

What percentage of gametes of a trihybrid plant
will have at least one recessive alleles ?
(1) 12.5% (2) 25% (3) 50% (4) 87.5%​

Answer 1

Answer:

3 50%

Explanation:

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Answer 2

The percentage of gametes of a trihybrid plant that will have at least one recessive allele is:

(4) 87.5%

Since it is a trihybrid plant, there will be 3 heterozygous pairs i.e. AaBbCc.

Now, The total number of gametes formed from AaBbCc = 2³ = 8.

The gametes formed will be:

ABC ABc

Abc AbC

aBC aBc

abC abc

ABC represents the dominant allele

Now we are left with 7 gametes that will show recessive alleles.

Therefore, the percentage will be (7/8)* 100 = 87.5%