Module 1: Variations in Plants and Animals & Human Genetic Variation

Question 1

What is the biological species concept?

Answer 1

species are a group of populations that can interbreed

Question 2

what are the components of natural selection?

Answer 2

variation, competition, adaptation, selection

Question 3

what refers to differences in traits?

Answer 3

variation

Question 4

what are inherited variation? and give 5 examples.

Answer 4

it is genetically controlled, results from activity of genes. it cannot be altered.

ex. hair & skin color, blood grp, fingerprint, and sex

Question 5

what are acquired variations? and give 5 examples

Answer 5

results from individuals nutrition and activities.

ex. language proficiency, athletic skills, body build, obesity, sun tan

Question 6

what is discontinuous variation

Answer 6

entirely genetically controlled, cannot be altered by external conditions

ex. abo blood group, genetic defects

Question 7

what is continuous variation

Answer 7

influenced by genes AND environment. there is a range of phenotypes between two extremes

ex. shade of hair color, height weight

Question 8

give the human genetic variations and give description for each

Answer 8

morphological: seen in cellular and subcellular environment. seen in anatomical and structural features

physiological: includes functional aspects

behavioral: includes attitude and behavior

sexual: primary- differences of reproductive organ, secondary- traits related to mating

Question 9

pedigree

Answer 9

a chart used to study the pattern of inheritance of a specific trait