Questions: A homozygous milk chocolate Easter bunny is crossed with a homozygous dark chocolate Easter bunny. Assuming dark chocolate is dominant over milk chocolate and the traits segregate according to Mendelian genetics, which traits will be observable in the offspring? All dark 3 milk to 1 dark All milk 3 dark to 1 milk

The answer is the first one: All dark.

Explanation for each option:

1. All dark: This is the correct answer. Since dark chocolate is dominant over milk chocolate, and both parents are homozygous (one for dark chocolate and one for milk chocolate), all offspring will inherit one dominant allele (dark) and one recessive allele (milk). Therefore, all offspring will display the dominant trait, which is dark chocolate.

2. 3 milk to 1 dark: This ratio would be expected if both parents were heterozygous for the trait, but in this case, one parent is homozygous for dark chocolate and the other is homozygous for milk chocolate.

3. All milk: This would only occur if milk chocolate were the dominant trait, or if both parents were homozygous for milk chocolate, which is not the case here.

4. 3 dark to 1 milk: This ratio would be expected in the F2 generation if the F1 generation were all heterozygous. However, the question is asking about the F1 generation, where all offspring will be heterozygous and display the dominant trait (dark chocolate).

Summary: When a homozygous dark chocolate Easter bunny (DD) is crossed with a homozygous milk chocolate Easter bunny (dd), all offspring will be heterozygous (Dd) and will display the dominant trait, which is dark chocolate. Therefore, the observable trait in the offspring will be all dark.