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Which statements are accurate based on Mendel’s laws and the information provided?

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.




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1 Answer

  1. 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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