Question

Give several examples of quantitative traits. How are these quantitative traits described within groups of individuals?

Short answer

Quantitative traits are those influenced by multiple genes and which can be measured numerically, such as height, weight, and blood pressure. Within groups, these traits typically form a normal bell curve distribution ranging from one extreme to another with majority of individuals around the average. This distribution is usually described using statistical parameters such as mean and standard deviation.

Step-by-step solution

Define Quantitative Traits

Quantitative traits refer to traits that are influenced by multiple genes and can be measured numerically. They typically follow a normal distribution and have a phenotypic value that can range across a continuum.

Examples of Quantitative Traits

Examples of quantitative traits include: height, weight, blood pressure and intelligence. These traits are often influenced by multiple genes as well as environmental factors.

Describe Quantitative Traits within Groups

Quantitative traits within a group of individuals can be described using statistical methods. The distribution of quantitative traits often forms a bell curve, ranging from one extreme to another with most individuals around the average or mean value. Important parameters in describing this distribution are the mean (average), median (the middle value) and the standard deviation (a measure of variation within the group).