Fusion Genetics

Genetics Practice

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Genotype - the combination of alleles.

Phenotype - the physical characteristics

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Multiple Choice

A cleft chin phenotype is dominant to no cleft. Which of the following genotypes is NOT a cleft chin?

• Cc

• CC

• cc

Multiple Select

Dimples are dominant to no dimples. Choose all of the genotypes that are dimple phenotypes.

• Dd

• dd

• DD

Multiple Choice

Freckles are dominant to no freckles. A genotype that is heterozygous will have which phenotype?

• freckles

• no freckles

Homozygous Dominant (RR)

Heterozygous (Rr)

Homozygous Recessive (rr)

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Multiple Choice

Which of the following genotypes is homozygous dominant?

• DD

• Dd

• dd

Multiple Choice

Which of the following genotypes is heterozygous?

• Mm

• MM

• mm

Multiple Choice

The genotype, Pp, is _______.

• homozygous dominant

• heterozygous

• homozygous recessive

Multiple Choice

The genotype, jj, is _______.

• heterozygous

• homozygous dominant

• homozygous recessive

Multiple Choice

The genotype, KK, is

• heterozygous

• homozygous dominant

• homozygous recessive

Multiple Choice

Which of the following genotypes is homozygous recessive?

• Aa

• aa

• AA

Multiple Choice

In guinea pigs, the allele for short hair is dominant. What genotype would a heterozygous short-haired guinea pig have?

• Ss

• SS

• ss

Punnett Squares are used to predict the probability of a cross of two parents.

Each parent has 2 alleles in their genotypes.

Multiple Choice

Green flowers are dominant to yellow flowers. If the parents (GG and gg) are crossed, what percentage of the offspring will have green flowers?

• 100%

• 75%

• 50%

• 25%

• 0%

Multiple Choice

Green flowers are dominant to yellow flowers. If two heterozygous parents are crossed, what percentage of their offspring will be homozygous dominant?

• 100%

• 75%

• 50%

• 25%

• 0%

Multiple Choice

Black fur is dominant to brown fur in dogs. A brown fur dog is crossed with a dog that is heterozygous. What percentage of the offspring will be black?

• 100%

• 75%

• 50%

• 25%

• 0%

Multiple Choice

Black fur is dominant to brown fur in dogs. A brown fur dog is crossed with a dog that is homozygous dominant. What percentage of the offspring will be brown?

• 100%

• 75%

• 50%

• 25%

• 0%

That's all folks.

Multiple Choice

Which is heterozygous ?

• Tt

• TT

Multiple Choice

Which is homozygous ?

• Ee

• EE

Multiple Choice

What is a phenotype?

• The genetic make up (code or letters)

• The physical appearance of a gene

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

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

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

Multiple Choice

A heterozygous yellow pea plant's genotype would be:

• YY
• yy
• Yy
• Yg

Multiple Choice

An organism's appearance is known as its

• heredity
• phenotype
• genotype
• pedigree

Multiple Choice

Which of the following genotypes is a homozygous (purebreed)?

• Bb

• Gg

• bb

• Dd

Multiple Choice

What is the definition of phenotype?

• The physical expression of a trait

• The genetic combination of alleles

• A gene on the DNA strand

• A variation of a gene

Multiple Choice

One form of a gene is called_______________

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

Multiple Choice

Which of the following is a phenotype?

• Bb
• Black fur

Multiple Choice

A __________ carries information that determines one of your traits.

• chromosome

• gene

• trait

• Punnett square

Multiple Choice

What is the definition of an allele?

• One variation of a gene

• The part of a DNA strand that codes for a protein

• Having two identical copies of a gene

• Have two different copies of a gene

Multiple Choice

Which is an example of an allele?

• eye color

• Bb

• brown eyes

• BB