Chapter 2.5 Variation and inheritance

Question 1

Differences that can be seen between individual members of a species are called

Answer 1

Variation

Question 2

In discrete variation the differences in a characteristic are

Answer 2

clear-cut and show a discontinuous pattern.

Question 3

In continuous variation their is a

Answer 3

range of variation between the extremes of a characteristic

Question 4

Discrete variation arises because

Answer 4

individuals carry different alleles of the discrete genes for the characteristic

Question 5

In continuous variation, the characteristic is usually

Answer 5

polygenic which means that different alleles of many different genes are involved

Question 6

The phenotype of an organism is the

Answer 6

outward appearance of a characteristic it has

Question 7

The genotype of an organism is a

Answer 7

statement of the alleles it has for a characteristic

Question 8

Dominant alleles always show in the

Answer 8

phenotype of an organism that has them

Question 9

Recessive alleles only show themeselves

Answer 9

in the phenotype if an organism has inherited one from each parent

Question 10

A homozygous organism has

Answer 10

two copies of the same allele of a particular gene, one from each parent

Question 11

A heterozygous organism has

Answer 11

inherited two different alleles of the same gene; one from each parent.