7C. Genotypes and Phenotypes

Question 1

A genotype is composed of

Answer 1

two alleles for a particular gene

Question 2

The two alleles make up the

Answer 2

genotype, for a trait, structure, or aspect of the organism’s function

Question 3

Homozygous

Answer 3

two identical alleles have been inherited.

Question 4

Heterozygous

Answer 4

two different alleles have been inherited. This phenotype is a carrier

Question 5

Complete dominance

Answer 5

When the alleles are not expressed equally with one allele being dominant and the other recessive.

Question 6

Dominant allele will

Answer 6

mask the effects of the recessive allele, only one is needed to show the trait.

Question 7

Dominant allele is represented by a

Answer 7

CAPITAL LETTER

Question 8

Recessive alleles will

Answer 8

only be expressed if two recessive alleles make up the genotype.

Question 9

Recessive allele is represented by a

Answer 9

lower case letters

Question 10

Phenotype

Answer 10

the physical characteristics/ representation of their genotype.

Question 11

Codominance

Answer 11

When two alleles are equally dominant.

Question 12

If an organism is heterozygous for a trait in codominance

Answer 12

then both phenotypes will be expressed.

Question 13

Incomplete dominance

Answer 13

When 2 alleles are not strong enough to be fully expressed in heterozygous individuals

Question 14

sex-linked traits are present on

Answer 14

the X or Y chromosome

Question 15

As males only have one X chromosome

Answer 15

X-linked disorders are more common in males.

Question 16

An affected father always passes an affected allele to

Answer 16

his daughters

Question 17

An affected mother always passes affected alleles to

Answer 17

her sons