Chapter 3

Question 1

Heredity

Answer 1

The passing of physical characteristics from parent to offspring

Question 2

Trait

Answer 2

A specific characteristic, such as stem height or seed color.

Question 3

Genetics

Answer 3

The scientific study of heredity

Question 4

Fertilization

Answer 4

New organism formed when a egg and a sperm cells join

Question 5

Purebred

Answer 5

The offspring of many generations that have the same form of a trait

Question 6

Gene

Answer 6

The factors that control a trait

Question 7

Alleles

Answer 7

The different forms of genes

Question 8

Dominant allele

Answer 8

One whose trait always shows up in the organism

Question 9

Recessive allele

Answer 9

Hidden whenever the dominant allele is present

Question 10

Hybrid

Answer 10

Has two different alleles for a trait

Question 11

Probability

Answer 11

A number that describes how likely it is that an event will occur

Question 12

Punnett squar

Answer 12

A chart that shows all the possible wats alleles can combine in a genetic cross

Question 13

Phenotype

Answer 13

Is physical appearance

Question 14

Genotype

Answer 14

Is genetic make up, or alleles

Question 15

Homozygous.

Answer 15

A

Question 16

Heterozygous

Answer 16

A

Question 17

Incomplete dominance

Answer 17

When one allele is only partly dominant

Question 18

Codominance

Answer 18

When both alleles for a gene are expressed equally

Question 19

Multiple alleles

Answer 19

Three or more alleles determine the trait

Question 20

Polygenic inheritance

Answer 20

When more then one gene affects a trait

Question 21

Meiosis

Answer 21

The process by which the number of chromosomes is reduced by half as sex cells form.