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Which is a dominant trait ?...

Which is a dominant trait ?

A

Colour blindness

B

Albinism

C

Haemophilia

D

`Rh^(+)` factor.

Text Solution

AI Generated Solution

The correct Answer is:
To determine which of the given traits is dominant, we will analyze each option based on their genetic inheritance patterns. ### Step-by-Step Solution: 1. **Understanding Dominant and Recessive Traits**: - Dominant traits are expressed in the phenotype even if only one copy of the allele is present. Recessive traits require two copies of the allele to be expressed. 2. **Analyzing the Options**: - **Color Blindness**: This condition is caused by a recessive allele located on the X chromosome. Since it is recessive, it is not a dominant trait. - **Albinism**: Albinism is also caused by a recessive allele. Therefore, this trait is not dominant either. - **Hemophilia**: Similar to color blindness, hemophilia is a sex-linked recessive disorder. It requires two copies of the recessive allele (or one in males) to manifest, making it a recessive trait. - **RH Positive Factor**: The RH factor is determined by a dominant allele. If the RH factor is present (even in one copy), the person will be RH positive. 3. **Conclusion**: - Among the options provided, the RH positive factor is the only trait that is dominant. ### Final Answer: The dominant trait among the options is **RH positive factor**. ---
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