Of the following traits, which one is acquired (i.e., not inherited)?(1 point)
eye shape
fingernail length
skin tone
number and presence of dimples
Fingernail length is the trait that is acquired (not inherited).
Of the traits you mentioned, the one that is acquired and not inherited is the number and presence of dimples.
To determine which of the listed traits is acquired rather than inherited, we need to understand the difference between these two terms.
Inherited traits are characteristics that are passed down from parents to their offspring through genes. These traits are typically controlled by specific genetic factors and are present at birth. For example, eye color is largely inherited.
Acquired traits, on the other hand, are characteristics that are developed or acquired after birth. They are primarily influenced by environmental factors or personal choices. These traits are not passed down through genetic material.
Now, let's analyze each trait from the list:
1. Eye shape: Eye shape is primarily determined by genetic factors and is therefore considered an inherited trait. Certain eye shapes, such as the presence of epicanthic folds, are more common in certain populations due to genetic factors.
2. Fingernail length: Fingernail length can be influenced by a combination of genetic and environmental factors. In general, nails tend to grow to a certain length based on genetics, but external factors like nail care and grooming can affect their appearance and length. Therefore, fingernail length can be considered as a combination of inherited and acquired traits.
3. Skin tone: Skin tone is primarily determined by genetic factors, specifically melanin production. Different levels of melanin production lead to variations in skin color, making skin tone an inherited trait.
4. Number and presence of dimples: Dimples are small indentations that appear on the cheeks or chin when a person smiles. The presence or absence of dimples is an inherited trait. This means that if both parents have dimples, there is a higher probability of their child having dimples as well.
Based on the explanations provided, the trait that is acquired (i.e., not inherited) from the given list is the fingernail length.