Genetics

Question 1

What are co-dominant traits?

Answer 1

When two traits are expressed in heterozygote individuals

Question 2

What is an example of a co-dominant trait?

Answer 2

AB blood type.

Question 3

What is incomplete dominance?

Answer 3

When the heterozygote is distinct from homozygous forms.

Question 4

What is an example of incomplete dominance?

Answer 4

Wavy hair.

Question 5

What are polygenic traits?

Answer 5

More than one gene determines a trait

Question 6

What are examples of polygenic traits?

Answer 6

Height, Hair color, Eye color, Etc.

Question 7

What are environmental influences?

Answer 7

Factors that are not inherited that can influence things such as height, heart disease, etc.

Question 8

What is an example of an environmental influence?

Answer 8

Nutrition.

Question 9

What are pleiotropic traits?

Answer 9

Where one gene determines more than one trait.

Question 10

What is an example of a pleiotropic trait?

Answer 10

XX = Female and Y = Male

Question 11

How is eye color regulated?

Answer 11

It is regulated by 2 genes. The + allele = more pigment and the - allele = less pigment.

Question 12

What are genes?

Answer 12

The basic units of heredity.

Question 13

What are alleles?

Answer 13

Distinct forms of specific genes.

Question 14

What are diploids?

Answer 14

Two copies of a trait.

Question 15

Are somatic cells diploids or haploids?

Answer 15

Diploids.

Question 16

What are haploids?

Answer 16

One gene copies.

Question 17

Are gametes diploids or haploids?

Answer 17

Haploids.

Question 18

What does homozygous mean?

Answer 18

There are 2 copies of the same allele.

Question 19

What does heterozygous mean?

Answer 19

There are 2 different alleles.

Question 20

What are genotypes?

Answer 20

Allele forms which an individual can carry.

Question 21

What are phenotypes?

Answer 21

The physical expression of a gene.

Question 22

What are dominant traits?

Answer 22

Traits where the phenotype is expressed whether it is homozygous or heterozygous.

Question 23

What are recessive traits?

Answer 23

Traits which are only expressed when the genotype is homozygous.

Question 24

What is true breeding?

Answer 24

Crossing 2 recessive individuals.

Question 25

What is the blending theory of inheritance?

Answer 25

That offspring are a blend of parental traits.

Question 26

What is a monohybrid cross?

Answer 26

Testing the cross of one trait type.

Question 27

What is the principle of segregation?

Answer 27

Traits do not blend together but remain distinct.