Inheritance

Front 1

Alternative forms of a gene having the same position on a pair of homologous chromosomes bestdescribes ________________.

Back 1

Alleles

Front 2

The law of ___________ states that each gamete generally receives only one copy of a gene.

Back 2

Segregation

Front 3

Which of the following statements about alleles is LEAST true?

Back 3

Dominant alleles are always more common in a population

Front 4

Which of the following correctly shows a genotype for a single trait?

A.) t

B.) Tt

C.) AaTt

D.) Brown Eyes

Back 4

Tt

Front 5

The position that a gene occupies on a chromosome is its _________.

Back 5

Locus

Front 6

Dad is homozygous for tongue-rolling and mom has a heterozygous genotype. The probability that thefirst child will be a tongue-roller is ________%.

Back 6

100%

Front 7

A man and woman have heterozygous genotypes for ear-lobe attachment. The probability that their firstchild will have free ear lobes is ________%.

Back 7

75%

Front 8

A man with hitchhikers thumb marries a woman with a heterozygous genotype for the trait. Theprobability that their first child will have hitchhikers thumb is ________%.

Back 8

50%

Front 9

A man and woman have homozygous genotypes at the locus for a recessive disease, but only the manhas the disease. The probability that the first child will have the disease is ________%

Back 9

0%

Front 10

The physical characteristics of an individual are that person’s ___________.

Back 10

Phenotype

Front 11

A two-trait cross involving two heterozygotes would most likely result in a __________ phenotypicratio.

Back 11

9:3:3:1

Front 12

A person with sickle-cell TRAIT has the genotype:

A.) Hb^A Hb^S

B.) Hb^A Hb^A

C.) Hb^S Hb^S

Back 12

Hb^A Hb^S

Front 13

Skin color is best described as a ________ trait.

Back 13

Polygenic

Front 14

Sex-influenced traits generally are on the X chromosome

Back 14

False

Front 15

Mom's genotype is XBXb and dad has normal vision. What is the expected % of color-blind sons?

Back 15

50%

Front 16

Dad has type AB blood, and mom has genotype AO. What is the chance that their child will have typeA blood?

Back 16

50%

Front 17

A person with genotype AO generally can receive blood from a person with genotype:

Back 17

AA

Front 18

The pedigree in the picture best depicts what type of disease (dark circle/square indicates disease)?

Back 18

Autosomal Dominant

Front 19

What is the genotype of person #1?

Back 19

Aa

Front 20

What is the genotype of person #2?

Back 20

A?

Front 21

What is the genotype of person #4?

Back 21

aa

Front 22

_________ are alternative forms of a gene having the same position or locus on a pair of homologouschromosomes.

Back 22

Alleles

Front 23

TT is best described a ______________________ genotype (be specific).

Back 23

Homozygous Dominant

Front 24

In the context of genetics, ______________ refers to the physical characteristics of the individual.

Back 24

Phenotype

Front 25

Tongue rolling is inherited as a _______________ trait

Back 25

Dominant

Front 26

F1 generation is an abbreviation for ______________ generation 1.

Back 26

Filial

Front 27

A two-trait testcross between individuals heterozygous for both traits will most likely yield a____________ phenotypic ratio.

Back 27

9:3:3:1

Front 28

In an autosomal ____________________ disease two affected parents can produce an unaffected childbut two unaffected parents will not have affected children.

Back 28

Dominant

Front 29

Cystic fibrosis is acquired primarily through an autosomal ___________________ type of inheritance.

Back 29

Recessive

Front 30

Color blindness is inherited as a(n) _________________ trait

Back 30

Sex-linked

Front 31

Draw a Punnett square for the cross between a man with attached earlobes and a woman with aheterozygous genotype for the trait. Indicate what percentage of their children would be expected tohave free earlobes.

Back 31

r r

R Rr Rr

R rr rr 50% free and 50% attached

Front 32

Each individual has two alleles for MOST traits, but not all traits. Please explain.

Back 32

XY (only 1 Allele)

XX (2 Alleles)

Front 33

What are Alleles?

Back 33

Alternative forms of genes on the same loci on a pair of homologous chromosomes

Front 34

What is the definition of a dominant allele, and why are recessive traits more common in somepopulations?

Back 34

Specifies phenotype even if another form is present

Front 35

Draw a Punnett square for the cross between a man normal vision and a woman with a heterozygousgenotype for the trait. Indicate what percentage of their sons would be expected to be color-blind.

Back 35

X^B Y

X^B X^BX^B X^BY

X^b X^BX^b X^bY 50% sons colorblind

Front 36

An individual with type B blood cannot receive type A blood. Why?

Back 36

They have different antibodies

Front 37

Match the letters of the following statement with disease inheritance types below, ignoring thepossibility of rare spontaneous mutations. A letter may apply to more than one inheritance type: A)males and females generally are affected with equal frequencies, B) two affected parents can produce anunaffected child. C) males are more likely to have the disease, and D) two affected parents will alwayshave affected children

Autosomal Dominant

Autosomal Recessive

Sex-Linked

Back 37

Autosomal Dominant: B A D

Autosomal Recessive: A

Sex-Linked: C