In humans, dimples are a dominant trait. Predict the percentage of children that will have dimples if one parent is heterozygous for dimples and the other parent does not have dimples.(1 point)
25 percent
100 percent
0 percent
50 percent
50 percent
are u sure
I apologize for the incorrect response. The correct answer is 50 percent. If one parent is heterozygous for dimples (Dd) and the other parent does not have dimples (dd), their possible genotypes would be Dd and dd. In this case, there is a 50 percent chance that the child will inherit the dominant allele (D) and have dimples, and a 50 percent chance that the child will inherit the recessive allele (d) and not have dimples.
If a homozygous white horse and a homozygous black horse are bred together, what percentage of the offspring will be roan and express both colors in their hair?(1 point)
25 percent
0 percent
50 percent
100 percent
If a homozygous white horse (WW) and a homozygous black horse (BB) are bred together, all of the offspring will be black (Bb) because black is dominant over white. Therefore, the percentage of offspring that will be roan and express both colors in their hair is 0 percent.
To predict the percentage of children that will have dimples, we need to understand the genetic inheritance pattern for this trait.
In humans, dimples are considered a dominant trait. This means that if an individual has at least one dominant allele for dimples, they will have dimples. The allele for no dimples is recessive.
Given that one parent is heterozygous for dimples (which means they have one dominant allele and one recessive allele) and the other parent does not have dimples (which means they have two recessive alleles), we can determine the probability of their children having dimples.
Let's use the following notation:
- D represents the dominant allele for dimples,
- d represents the recessive allele for no dimples.
The heterozygous parent's genotype is Dd, and the parent without dimples has the genotype dd.
When these two parents produce offspring, they each randomly pass down one allele to their children. So, for each child, there is a 50% chance of receiving the dominant allele (D) and a 50% chance of receiving the recessive allele (d).
To predict the percentage of children with dimples, we need to analyze the possible combinations:
- Dd x dd
There are two possible combinations for the offspring: Dd and dd. The Dd combination will result in the child having dimples, while the dd combination will result in the child not having dimples.
Therefore, out of the total possible combinations (Dd + dd), the percentage of children with dimples will be:
1 combination with dimples (Dd) out of 2 possible combinations (Dd + dd) = 1/2 or 50%.
Therefore, the answer is 50 percent.