Ch. 10 Genetics

Multiple Choice

Genotype refers to the ...

• physical expression of the genes
• the possible combination of alleles in a gene
• whether an allele is dominant or recessive
• how an organism will appear

Multiple Choice

An offspring will receive how many alleles from each parent to determine a specific trait?

• one
• two
• three
• five

Multiple Choice

Which of the following is a phenotype?

• BB
• Bb
• bb
• Blue eyes

Multiple Choice

the passing of genetic traits from parent to offspring.

• heredity
• trait
• gene
• allele

Multiple Choice

having two of the same genes for the trait (sometimes called purebred).

• homozygous
• hetrozygous
• protein
• chromosome

Multiple Choice

having two different genes for a trait (sometimes called hybrid).

• protein
• homozygous
• heterozygous
• genotype

Multiple Choice

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %
• 25%
• 50%
• 75%

Multiple Choice

An allele whose trait only shows up when no dominant allele is present.

• hidden allele
• dominant allele
• recessive allele
• present allele

Multiple Choice

Snapdragon flowers come in red, pink and white.  What type of inheritance is this?

• Complete Dominance
• Incomplete Dominance
• Codominance
• Polygenic Inheritance

Multiple Choice

Incomplete dominance means that the traits are

• expressed equally
• dominant
• recessive
• blended

Multiple Choice

One form of a gene is called_______________

• a DNA
• a Phenotype
• a trait
• an allele

Multiple Choice

Which of the following genotypes is a purebred?

• Bb
• Gg
• bb
• Dd

Multiple Choice

If green is dominant over purple, then what is the genotype for this individual?

• Purple
• Green
• GG
• gg

Multiple Choice

Brown fur color is dominant over black fur color. Which of the following is the actual genotype of ALL of the offspring in the next generation of this cross for fur color?
AA x aa

• AA
• Aa
• aa
• brown fur

Multiple Choice

 Dominant alleles are-

• capital
• lowercase
• both
• neither

Multiple Choice

 Recessive alleles are-

• capital
• lowercase
• both
• neither

Multiple Choice

Tt is-

• homozygous dominant
• homozygous recessive
• heterozygous
• none of these

Multiple Choice

Who is considered the "father" of modern genetics?

• Einstein

• Mendel

• Disney

• Washington

Multiple Choice

TT,tt,PP,pp,SS,ss are examples of alleles that are?

• homozygous
• heterozygous
• different
• homologous 

Multiple Choice

Y for yellow body is dominant over y for blue body.  What alleles would produce yellow bodies?

• YY,yy
• Yy,yy
• YY only
• YY,Yy

Multiple Choice

The exact genetic makeup of an organism, such as RR, Tt, PP is its?

• phenotype
• dominance
• genotype
• trait

Multiple Choice

"The Great White Shark was 20 feet in length.  Phenotype or Genotype?

• phenotype
• genotype

Multiple Choice

If "T" is the allele for tall and "t" is the allele for short, then Tt would produce?

• tall
• short
• medium
• not enough info

Multiple Choice

A physical characteristic that can be passed from parent to offspring.

• behavior
• trait
• strong muscles
• ability to fly a plane.

Multiple Choice

Alternant or different genes that code for the same trait are called?

• chromosomes

• segments

• alleles.

• homozygous.

Multiple Choice

What plant did Mendel study?

• pea plant

• spinach

• carrots

• sunflowers

Multiple Choice

Which of the following alleles is homozygous (purebred) recessive?

• TT

• Tt

• tt

• ts

Multiple Choice

Red (R) is dominant over white (r). How can a flower be white?

• It can have RR and be white.

• It has to have rr.

• It has to have rR

• There is no way it can be white until the third generation.

Multiple Choice

Females-XX; MalesXY.  A couple has 4 girls.  What is the chance the next child will be a boy?

• 75%
• 100%
• 25%
• 50%

Multiple Choice

Which of the following genotypes is homozygous recessive?

• RR
• Rr
• rr
• None of the Above

Multiple Choice

Brown (B) is dominant over white (b). Which genotype is a purebred for brown fur?

• BB
• Bb
• bb
• All of the above

Multiple Choice

What does a Punnett Square help you do?

• Determine the ratio of phenotypes
• Determine the ratio of genotypes
• Predict possible traits the offspring will have
• All of the above

Multiple Choice

Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?

• 100% Pp (purple)
• 50% Pp (purple); 50% pp (white)
• 75% Pp (purple); 25% pp (white)
• 25% PP, 50% Pp, 25% pp
  75% purple, 25% white

Multiple Choice

Brown fur color is dominant over black fur color. Which of the following is the actual genotype of ALL of the offspring in the next generation of this cross for fur color?
AA x aa

• AA
• Aa
• aa
• brown fur

Multiple Choice

B - black, b - brown.  Two black mice mate and have some black and some brown mice.  What is the genotype of the parents?

• BB x Bb
• BB x bb
• Bb x Bb
• Bb x bb

Multiple Choice

Which represents the genotype of a homozygous condition?

• Bb
• BC
• bb
• bc

Multiple Choice

One reason for Mendel's success with genetic studies of peas was that he

• used only hybrid pea plants
• used peas with large chromosomes
• studied large numbers of offspring
• discovered the sources of variation in peas

Multiple Choice

A cross of a red cow with a white bull produces all road offspring. This type of inheritance is known as

• codominance
• incomplete dominance
• multiple alleles
• "breed time:

Multiple Choice

If an organism with a homozygous dominant trait was mated in a test cross, all the F1 offspring would be

• homozygous dominant
• homozygous recessive
• heterozygous
• 50% homozygous;50% heterozygous

Multiple Choice

A woman with blood genotype I(A)i marries a man with blood genotype I(B)i. What is the probability that they would have a child with type O blood?

• 1/1
• 1/2
• 1/3
• 1/4

Multiple Choice

A cross between two tall garden pea plants produced 314 tall plants and 98 short plants. What genotypes are the parents?

• TT and tt
• TT and Tt
• Tt and Tt
• TT and TT

Multiple Choice

In screech owls, red feathers are dominant over gray feathers. If two heterozygous red-feathered owls are mated, what percentage of their offspring would be expected to have red feathers?

• 25%
• 50%
• 75%
• 100%

Multiple Choice

A person with type O blood marries a person with type AB blood. Possible blood genotypes of their children are

• I(A)i and I(B)I(B)
• I(B)I(B) and I(A)I(A)
• I(A)i and I(B)i
• I(A)I(B) and ii

Multiple Choice

In certain rats, black fur is dominant over white fur. If two rats, both heterozygous for fur color are mated, their offspring would be expected to have 

• four different genotypes and two different colors
• two different genotypes and three different colors
• three different genotypes and two different colors
• three different genotypes and three different colors

Multiple Choice

Red flowers (R) show incomplete dominance over white flowers (r). Cross two pink flowers (Rr).

What percentage of the offspring will have red flowers?

• 0%

• 25%

• 50%

• 75%

• 100%

Multiple Choice

Red flowers (R) show incomplete dominance over white flowers (r). Cross two pink flowers (Rr).

What percentage of the offspring will have pink flowers?

• 0%

• 25%

• 50%

• 75%

• 100%

Multiple Choice

Red flowers (R) show incomplete dominance over white flowers (r). Cross two pink flowers (Rr).

What percentage of the offspring will have white flowers?

• 0%

• 25%

• 50%

• 75%

• 100%

Multiple Choice

Red hair (R) and white hair (W) are codominant in cows. They produce a cow with both red and white spots, called "roan", when mixed.

Cross a white cow (WW) with a roan cow (RW).

What percentage will be red?

• 0%

• 25%

• 50%

• 75%

• 100%

Multiple Choice

Red hair (R) and white hair (W) are codominant in cows. They produce a cow with both red and white spots, called "roan", when mixed.

Cross a white cow (WW) with a roan cow (RW).

What percentage will be white?

• 0%

• 25%

• 50%

• 75%

• 100%

Multiple Choice

What did Mendel call the two kinds of traits exhibited by the pea plants (one coming from the father, one from the mother)?

• Genesis
• Elective traits
• Alleles
• Quadrants

Multiple Choice

A __________ is a segment of DNA that codes for a particular protein, which leads to a particular trait.

• Gene
• Allele
• Codon
• Nucleotide

Multiple Choice

The letters on the TOP AND SIDE of a punnett square represent ______________.

• The combination of alleles in offspring.
• The possible alleles given by the parents following meiosis.
• The genotype and phenotype of offspring.
• The results of genetic mutations in offspring.

Multiple Choice

What is the predicted percentage of homozygous recessive offspring in this cross?

• 0%

• 25%

• 50%

• 75%

Multiple Choice

Why do we see only tall plants in the second generation?

• The gene for tall height is dominant
• The gene for short height is dominant
• The gene for tall height is recessive
• The parents did not have the tall gene

Multiple Choice

The dominant trait in this punnett square is

• yellow pea seeds
• green pea seeds
• there is no dominant seed

Multiple Choice

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %
• 25%
• 50%
• 75%

Multiple Choice

A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:

• all black
• all white
• all gray
• speckled black and white

Multiple Choice

In some carnations, flower color exhibits codominance.  Identify the correct genotypes for red, white, and speckled carnations.

• Red = RR, white = rr, speckled = Rr
• Red = RR, white = WW, speckled = rw
• Red = RR, white = ww, Speckled = Rw
• Red = RR, white = WW, speckled = RW

Multiple Choice

Pictures of chromosomes that can show genetic disorders or gender are called _____.

• karyotypes
• pedigrees
• punnett squares
• genetic profiles

Multiple Choice

What law states that in Tt the person will only show the dominant allele

• law of segregation
• law of independent assortment
• law of dominance
• law of punnett squares