Genetics Lab Notes

Question 1

What are units of information about specific traits called?

Answer 1

GENES

Question 2

______________ is the location of a gene on a chromosome

Answer 2

LOCI/LOCUS

Question 3

_____________ are similar chromosomes, one from each parent, with similar genes at the same locus

Answer 3

HOMOLOGOUS CHROMOSOMES

Question 4

___________________ are different molecular forms of the same trait

Answer 4

ALLELES

Question 5

Brown eyes/ Blue eyes are examples of what?

Answer 5

ALLELES

Question 6

A ____________________ is an allele that can mask another allele

Answer 6

DOMINANT ALLELE

Question 7

AA aa Aa…. The “A” is an example of what?

Answer 7

A DOMINANT ALLELE

Question 8

What determines the outward expression when present?

Answer 8

THE DOMINANT ALLELE

Question 9

A _____________________ is an allele that is masked by a dominate allele

Answer 9

RECESSIVE ALLELE

Question 10

AA aa Aa…. The “a” is an example of what?

Answer 10

A RECESSIVE ALLELE

Question 11

The ______________ must have two recessive alleles for a trait to show

Answer 11

RECESSIVE ALLELE

Question 12

How many alleles does the recessive trait need for the give trait to show?

Answer 12

TWO

Question 13

What is the term that is used when both alleles in a pair are the same?

Answer 13

HOMOZYGOUS

Question 14

______________ is the specific gene pairs an individual carries

Answer 14

THE GENOTYPE

Question 15

The _______________ can not be seen

Answer 15

GENOTYPE

Question 16

What a phenotype?

Answer 16

AN INDIVIDUAL’S OBSERVABLE TRAITS

Question 17

The ________________ can be seen

Answer 17

PHENOTYPE

Question 18

How is the genotype expressed?

Answer 18

AA, Aa, aa

Question 19

How is the phenotype expressed?

Answer 19

blue, brown, tall, dwarf

Question 20

A _____________________ is a cross involving one gene pair for a single trait

Answer 20

MONHYBRID CROSS

Question 21

What is a monohybrid cross?

Answer 21

A cross involving one gene pair for a single trait

Question 22

What is a dihybrid cross?

Answer 22

A cross involving two gene pairs of two traits

Question 23

A __________________ is a cross involving two gene pairs of two traits

Answer 23

DIHYBRID CROSS

Question 24

A ___________________ is a device used to predict the possible genotypes and phenotypes of the offspring from a cross

Answer 24

PUNNET SQUARE

Question 25

What is a punnett square?

Answer 25

A device used to predict the possible genotypes and phenotypes of the offspring from a cross

Question 26

__________________ is a trait which results when there is not a dominant/recessive relationship but rather a “blending” of traits. An unexpected phenotype can result

Answer 26

INCOMPLETE DOMINANCE

Question 27

What is incomplete dominance?

Answer 27

A trait which results when there is not a dominant/recessive relationship but rather a “blending” of traits. An unexpected phenotype can result