genetics

GeneticsGeneticsGeneticsGeneticsWith your FAVORITE HOST…With your FAVORITE HOST…

Ms. IngsMs. Ings

If a boy is colorblind, he inherited it from…

• A) His mother• B) His father• C) Both his mother and father• D) Unable to determine

Your phenotype is based on

• A) Your DNA• B) Your Genotype• C) Your Environment• D) Both DNA and Environment

A man with Achondroplasia (whose mother was normal) marries a female that is normal. What is the chance of

having a child with this disorder?

• A. 0%• B. 25%• C. 75%• D. 50%

If you crossed two heterozygous individuals, their

offspring would have• A) 0% Homozygous recessive• B) 25% Heterozygous• C) 75% Dominant Phenotype• D) 50% Recessive Phenotype

Independent assortment and crossing over increase

• A) The number of offspring• B) Genetic Linkage• C) Sex-linked traits• D) Genetic Diversity

Genes located on the X or Y chromosomes are referred to as

• A) Alleles• B) Recessive• C) Sex-linked • D) Autosomal

Blood types is an example of…

• 1. Codominance 2. incomplete dominance 3. polygenetic 4. multiple alleles

• A. 1• B. 1, 2• C. 2, 3• D. 1, 4

A Red flower is crossed with a white flower, the offspring are

pink, this is an example of

• A) Co-Dominance• B) Incomplete Dominance• C) Sex-linked • D) Multiple Genes

Using this pedigree, individuals with the arrows

are

• A) Heterozygous• B) Homozygous Dominant• C) Homozygous Recessive• D) Genotype unknown

Explain how this happens.

For a female to have hemophilia, she must

have

• A) a Y chromosome• B) at least one dominant allele• C) two recessive alleles• D) two dominant alleles

A person with type A marries a person with type O. Which of

following could be an offspring?

• A. Type O• B. Type B• C. Type AB• D. Cannot Deterine

Roan cows are an example of

• A) Co-Dominance• B) Incomplete Dominance• C) Sex-linked • D) Multiple Genes

Most human traits are …

• A) Dominant• B) Recessive• C) Either Dominant or Recessive• D)

Complex and still not fully understood

Number 2 is

• A) Homozygous dominant• B) Heterozygous• C) Sex-linked • D) Homozygous Recessive

1 2

3 4

E E

e

E

Two parents have the genotype Gg for a dominant genetic disorder.

What are the chances their offspring will have the disorder?

• A) 25%• B) 50%• C) 75%• D) 100%

An individual who is heterozygous for a ______ disorder is called a carrier.

• A) Allele• B) Albinism• C) Recessive• D) Dominant

Seed color and pod size are examples of

• A) Genotypes• B) Phenotypes• C) Heterozygous• D) Heredity

Cystic Fibrosis is a recessive disorder. Resulting in the

following symptoms.• Fill in the blank.

The alleles from your mother and father separating into

different gametes is seen in

• A) Law of Dominance• B) Co-Dominance• C) Law of Independent Assortment• D) Law of Segregation

The ______ can only result in one _____.

• A) Trait, Allele• B) Genotype, phenotype• C) Phenotype, Allele• D) Phenotype, Genotype

Both parents have widow’s peak. Their children should

have…

• A) All Widow’s peak• B) No Widow’s peak• C)

Half widow’s peak and half no widow’s peak

• D) Not enough information

F2:F1 :: F1:___

• A) F2• B) P2• C) P• D) F1

This diagram demonstrates

• A) Test Cross• B) Pedigree• C) Dihybrid Cross• D) Karyotype

II4 is what relation to III3?• A) Aunt• B) Father• C) Uncle• D) Nephew

For two heterozygous individuals the phenotype ratio is _____ and the genotype

ratio is _____.

• A) 3:1, 1:2:1• B) 1:2:1, 2:2• C) 1:1, 3:1• D) 3:1, 2:2

If a person has type AB blood and marries a man with type A. Which

of the following could NOT be a possible genotype of the offspring?

• A. Type A• B. Type AB• C. Type O• D. Type B

If a family has 4 girls (like mine!), what are the chances of their next

child being a boy?

• A) 0%• B) 25%• C) 50%• D) 100%

Mendel’s discoveries came from his…

• A) Careful microscopic evaluation of chromosomes and genes

• B) Dissections on how fertilization occurs in pea plants

• C) Breeding experiments with many generations of fruit flies

• D) Analysis of offspring from several crosses of pea plants

Alternate forms of a gene are called _______.

• A) Traits• B) Alleles• C) Chromosomes• D) Heredity

Which of the following has a heterozygous genotype?

• A) RR• B) rr• C) Rr• D) Rg

On average there are more color blind males because

• A. Women need two alleles to be colorblind

• B. Men require two alleles to be colorblind• C.

Women have two X chromosomes and it is inherited on the Y chromosome

• D. Men are more likely due to chance

A man with hemophilia marries a woman that is a carrier. What

percent of their sons will have it?

• A) 0%• B) 25%• C) 50%• D) 100%

Two roan cows are crossed. What are the phenotype ratio of

the offspring?

• A) 3:1• B) 75%:25%• C) 50% : 50%• D) 1:2:1

BbRr x BbRr are crossed. What are the phenotype

ratio of the offspring?

• A) 3:1• B) 1:2:1• C) 1:1:1:1• D) 9:3:3:1

What is the pattern of inheritance for this pedigree?

• A) Dominant• B) Recessive• C) Sex Linked• D) Cannot Determine

Parents, one heterozygous for two traits and the other homozygous

recessive for two traits, produce_______ offspring that are homozygous dominant for both

traits • A) 100%• B) 75%• C) 25%• D) 0%

If a girl is colorblind, …

• A) Her mother must be colorblind• B) Her father cannot be colorblind• C) Her mother cannot be colorblind• D) Her father is colorblind

Straight hair is recessive and curly hair is dominant. In co-dominance, the heterozygous condition would be

• A) Curly• B) Straight• C) Wavy• D) Some straight hairs, some wavy

hairs

Which of the following is a dominant trait?

• A) Ability to taste PTC• B) Hitchhikers thumb• C) Cystic Fibrosis • D) Albinism

In a pedigree, a circle represents a …

• A) Child• B) Parent• C) Male• D) Female

When an organism has a heterozygous genotype, the

dominant trait is seen. This can be explained by …

• A) Law of Dominance• B) Law of Segregation• C) Law of Independent Assortment • D) Law of Combination of Traits

A person has a widow’s peak. All of the following EXCEPT ____ can be the

genotype.

• A) WW• B) Ww• C) W_• D) ww