Melanin Practice Test

What is a genotype?

• The physical appearance of an organism

• The set of genes in our DNA which is responsible for a particular trait

• The study of genes and their functions

• A type of genetic mutation

Tags

NGSS.HS-LS1-1

What does it mean if an individual is homozygous recessive for a trait?

• They have two different alleles for a trait

• They have two dominant alleles for a trait

• They have two identical recessive alleles for a trait

• They do not carry the gene for that trait

Tags

NGSS.HS-LS3-1

In a Punnett square, what does a capital letter represent?

• A recessive allele

• A dominant allele

• A genotype

• A phenotype

Which of the following is an example of a homozygous recessive genotype?

• AA

• Aa

• aa

• AB

How many alleles for a typical gene does a person inherit from their parents?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a Punnett square, what does the combination of one dominant allele and one recessive allele result in?

• A homozygous dominant genotype

• A homozygous recessive genotype

• A heterozygous genotype

• A mutation

Which of the following is true about recessive traits?

• They are always more common in the population than dominant traits

• They can only be expressed if the individual has two copies of the recessive allele

• They are always less advantageous than dominant traits

• They cannot be passed on to offspring

What is the purpose of a Punnett square?

• To predict the outcome of genetic crosses

• To determine the physical appearance of an organism

• To change the genotype of an organism

• To identify mutations in genes

If both parents are carriers of a recessive allele (heterozygous), what is the probability that their child will express the recessive trait?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What does the term "phenotype" refer to?

• The genetic makeup of an organism

• The physical appearance or visible traits of an organism

• A type of genetic disorder

• The study of heredity and the variation of inherited characteristics