Unit 5 Science

Question 1

when the heterozygote phenotype is a combination of the homozygous phenotypes

Answer 1

incomplete dominance

Question 2

different forms of a gene

Answer 2

allele

Question 3

a section on a chromosome that has genetic information for 1 trait.

Answer 3

gene

Question 4

threadlike structures that contain genetic information in the form of a gene.

Answer 4

chromosome

Question 5

when both alleles are expressed.

Answer 5

co dominance

Question 6

how is the incomplete and co dominance phenotypic ratio set up?

Answer 6

Dom:hetero:homorec

Question 7

a genetic factor that blocks another factor

Answer 7

dominant

Question 8

the offspring of 2 true breeding plants with different forms of the same trait.

Answer 8

hybrid

Question 9

negative traits that result from inheriting a sex-linked gene

Answer 9

sex linked disorders

Question 10

a gene on a sex chromosome

Answer 10

sex-linked gene

Question 11

these determine the gender of an individual and carry sex-linked characteristics.

Answer 11

sex chromosome

Question 12

what is the male sex chromosome?

Answer 12

xy

Question 13

what is the female sex chromosome?

Answer 13

xx

Question 14

what is a human example for a result of polygenic inheritance?

Answer 14

• eye color
• skin color
• hair color
• weight

Question 15

when more than 2 alleles control 1 trait in a population

Answer 15

multiple alleles

Question 16

when multiple genes determine the phenotype of a trait.

Answer 16

polygenic inheritance.

Question 17

a model used to predict possible genotypes and phenotypes of offsprings if parental genotypes are known

Answer 17

punnet square

Question 18

fill in the blank:
when organisms reproduce each reproductive cell contributes _______ factor(s) for each trait

Answer 18

1

Question 19

pollen from one plant reaches the pistil of a flower on a different plant.

Answer 19

cross pollination

Question 20

how a trait appears or is exposed

Answer 20

phenotypes

Question 21

a plant that always produces offspring with the same trait when it is self pollinated

Answer 21

true breeding plant

Question 22

how is the simple dominance phenotypic ratio set up?

Answer 22

Dom:rec

Question 23

the likelihood that a specific event will occur

Answer 23

probability

Question 24

when the 2 alleles of a gene are the same

Answer 24

homozygous

Question 25

when the 2 alleles of a gene are different.

Answer 25

heterozygous

Question 26

the 2 alleles that control the phenotype of a trait.

Answer 26

genotype

Question 27

the passing of traits from parents to offspring

Answer 27

heredity

Question 28

the study of how traits are passed from parents to offspring

Answer 28

genetics

Question 29

who is the father of genetics?

Answer 29

Gregor Mendel

Question 30

pollen from 1 flower lands on the pistol of a flower on the same plant

Answer 30

self pollination

Question 31

what represents a recessive allele?

Answer 31

lower case letter

Question 32

what represents a dominant allele?

Answer 32

capital letter

Question 33

how is the simple genotypic ratio set up?

Answer 33

homdom: hetero: homorec

Question 34

a cross that provides information about 1 trait

Answer 34

monohybrid cross

Question 35

a female who has one recessive copy of the bad gene

Answer 35

carrier

Question 36

a visual tool for following a trait through generations of a family

Answer 36

pedigree