Question

Verify dominant or recessive traits. To perform this project, observe 10 students around you or 10 people you walk past. Keep track of two (2) traits, and verify

whether they have

free ear lobes (not attached to facial skin) and
facial dimples.
Keep a post-it note or paper tally, just 1 through 10 in a column with "free lobes" and "dimples columns. Place an x or check in the 2 columns only if the person HAS
that trait. Now see what percentage is dominant (free ear lobes) and (dimples)? What percentage is recessive (attached lobes and no dimples)? Record your quick survey results.

Answer 1

To verify dominant or recessive traits such as free earlobes and facial dimples, observe 10 individuals, tally the presence of each trait, and calculate the percentage for both. Free earlobes and facial dimples are dominant traits, while attached earlobes and the absence of dimples are recessive.

Step-by-step explanation:

To verify dominant or recessive traits, you will observe traits such as free earlobes and facial dimples in individuals. Having free-hanging (free) earlobes is a dominant trait, while attached earlobes are a recessive trait. Similarly, having facial dimples is also often considered a dominant trait. For this project, you would tally if the people you observe have these traits and calculate the percentages.

1. Observe 10 individuals and note if they have free ear lobes or dimples.
2. Use a tally sheet with two columns; one for 'Free Lobes' and one for 'Dimples'.
3. Place an 'x' or a check mark in the relevant column for each individual with the trait.
4. Calculate percentages by dividing the number of individuals with the trait by 10 and then multiplying by 100.

For example, if 7 out of the 10 people observed have free earlobes, the percentage with this dominant trait would be 70%. Conversely, if 3 individuals have attached lobes, that would represent a 30% observation for the recessive trait.

The same method applies to the observation of facial dimples. To verify the prevalence of these traits, compare the percentages of observed dominant traits to those expected based on genetic principles.