3. Choose ONE trait observed in class and explain why one form of the trait is more frequent than the other form of the trait (i.e. why the dominant form is more frequent than the recessive form or vis-à-vis). TraitsPhenotype (Howmany?)Dominant RecessiveClassPercentPercentTotalDominant RecessiveMid-digital HairTongue RollingWidow's Peak12213336.36%63.64%2493372.73%27.27%7263321.21%78.79%Free Earlobes21123363.64%36.36%Facial Dimples11223333.33%66.67%Hitchhiker's Thumb9.243327.27%72.73%Relative Length ofthe Big ToePalmaris LongusMuscle20133360.61%39.39%11223333.33%66.67%Bent Little Finger4293312.12%87.88%Handedness2943387.88%12.12%Natural Curly Hair283315.15%84.85%TOTAL STUDENTS14193342.42%57.58%|(Average)

A trait is considered to be dominant if it is expressed even in heterozygous state of genotype.…

Choose ONE trait observed in class and explain why one form of the trait is more frequent than the other form of the trait (i.e. why the dominant form is more frequent than the recessive form or vis-à-vis).

Choose ONE trait observed in class and explain why one form of the trait is more frequent than the other form of the trait (i.e. why the dominant form is more frequent than the recessive form or vis-à-vis).

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter4: Pedigree Analysis In Human Genetics

Section: Chapter Questions

Problem 14QP: Analysis of Autosomal Recessive and Dominant Traits Huntington disease is a rare, fatal disease that...

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Concept explainers

Genetic Variation

Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.

Quantitative Genetics

Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.

Question

3. Choose ONE trait observed in class and explain why one form of the trait is more frequent than the other form of the trait (i.e. why the dominant form is more frequent than the recessive form or vis-à-vis).

Traits
Phenotype (How
many?)
Dominant Recessive
Class
Percent
Percent
Total
Dominant Recessive
Mid-digital Hair
Tongue Rolling
Widow's Peak
12
21
33
36.36%
63.64%
24
9
33
72.73%
27.27%
7
26
33
21.21%
78.79%
Free Earlobes
21
12
33
63.64%
36.36%
Facial Dimples
11
22
33
33.33%
66.67%
Hitchhiker's Thumb
9.
24
33
27.27%
72.73%
Relative Length of
the Big Toe
Palmaris Longus
Muscle
20
13
33
60.61%
39.39%
11
22
33
33.33%
66.67%
Bent Little Finger
4
29
33
12.12%
87.88%
Handedness
29
4
33
87.88%
12.12%
Natural Curly Hair
28
33
15.15%
84.85%
TOTAL STUDENTS
14
19
33
42.42%
57.58%
|(Average)

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