Alien parent 1 is heterozygous (Aa) with 4 arms. Alien parent 2 is homozygous recessive (aa) with 2 arms.
Select the statement(s) which are accurate based on Mendel’s laws and the information provided.
4 arms is the dominant trait.
50% of offspring will have 4 arms.
100% of offspring will have 2 arms.
2:4 of the offspring will have 2 arms.
The dominant trait is 2 arms.
Based on the information provided, the accurate statement is: 50% of offspring will have 4 arms.
Explanation:
– Parent 1 is heterozygous (Aa), meaning they have one dominant allele (A) for 4 arms and one recessive allele (a) for 2 arms.
– Parent 2 is homozygous recessive (aa), meaning they have two alleles for the recessive trait (2 arms).
When we cross these parents:
– The possible gametes from Parent 1 (Aa) are A and a.
– The possible gametes from Parent 2 (aa) are a and a.
The resulting genotypes of the offspring would be:
1. Aa (4 arms)
2. Aa (4 arms)
3. aa (2 arms)
4. aa (2 arms)
So, 50% (2 out of 4) of the offspring will have 4 arms (Aa), and 50% (2 out of 4) will have 2 arms (aa).
The other statements are incorrect because:
– 100% of the offspring will not have 2 arms.
– 2:4 of the offspring does not apply since we describe it in simplest terms (1:1).
– The dominant trait is 4 arms, not 2 arms.
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