Choose the correct words or phrases to complete the following description of gen
ID: 201691 • Letter: C
Question
Choose the correct words or phrases to complete the following description of genetic variability.
Please complete the following sentences:
Genetic variability is the presence of differences in___
a.) radiation
b.) ozone
among idividuals of a population. This variation arises from mutations, which can be caused by___
a.) radiation
b.) ozone
chemical mutagens, and random chance. If the mutations occur in reproductive cells, they can cause variation in___
a.) mutational potential
b.) heritable traits
Choose the correct words or phrases to complete the following description of evolution.
Evolution occurs when the frequenies of ___
a.) physical characteristics
b.) genes
c.) behavioral traits
change within a population
a.) within a single lifetime
b.) across multiple generations
Explanation / Answer
1.
Genetic variability is defined as differences in genotypes or environmental induced changes caused temporarily and result in nonheritable changes in phenotypes. Theseresult due to climate changes. Therefore, genetic variability is caused due to differences in ozone. Option b is correct.
2.
Among individuals in a population, the variability results from mutations that can be induced by radiation. Option a is correct.
3.
Chemical mutagens cause mutation at random and mutation in reproductive or germ cells results in variation of heritable traits. Option b is correct.
4.
Evolution is a gradual process resulting in changes in frequencies of genes in a population and this may occur across multiple generations. Option b is correct.