In humans, B is the allele for brown eyes and b is the allele for blue eyes. Two brothers both have brown eyes, but one of them has both the B and b alleles while the other only has B alleles. Which statement is true about the brothers?

They have the same phenotype but different genotypes.

They have the same genotype and phenotype.

They have different phenotypes and genotypes.

They have the same genotype but different phenotypes.

How are Incomplete Dominance and Co Dominance different than a normal Mendelian cross?

The heterozygous genotype has a unique phenotype

There is no heterozygous genotype

There is only one phenotype regardless of genotype.

Genotype refers to the ...

the possible combination of alleles in a gene

physical expression of the genes

whether an allele is dominant or recessive

Recessive alleles may not be expressed because they are

the least common allele in the population

the most common allele in the population

less likely to having crossing over

Bio MCAS Genetics/Punnett Square OR

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65 Qs

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9th - 12th Grade

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Practice Problem

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NGSS

HS-LS3-1, HS-LS3-2, HS-LS3-3

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Andrew Giese

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65 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Alleles that are the same are called

homozygous

heterozygous

dominant

recessive

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Alleles that are different are called

heterozygous

homozygous

dominant

recessive

Traits that show up more and mask or cover up the other trait are called

homozygous

heterozygous

dominant

recessive

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Traits that are often covered up and show only in the homozygous state are called

homozygous

heterozygous

dominant

recessive

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Traits shown by capital letters

dominant

recessive

sex-linked

codominant

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

trait shown by lower case letters

dominant

recessive

sex-linked

codominant

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The type of inheritance where both traits show at the same time

dominant

recessive

sex-linked

codominant

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Alleles that are the same are called

Alleles that are different are called

Traits that show up more and mask or cover up the other trait are called

Traits that are often covered up and show only in the homozygous state are called

Traits shown by capital letters

trait shown by lower case letters

The type of inheritance where both traits show at the same time

The type of inheritance where the trait is linked to the X chromosome

If 2 black guinea pigs have a white guinea pig and black is dominant to white, the parents must have been...

What you see, or the physical appearance.

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