genetics practice questions. standard 2d: mendel concluded that the alleles for tall stems in pea...

Genetics Practice Questions

Standard 2d: Mendel concluded that the alleles for tall stems in pea plants are dominant. Thus, crossing a purebred tall pea plant

with a purebred short pea plant should result in

A all tall plants.B all short plants.C all medium height

plants.D half short and half

tall plants.

Standard 2d: Mendel concluded that the alleles for tall stems in pea plants are dominant. Thus, crossing a purebred tall pea plant

with a purebred short pea plant should result in

Answer:A all tall plants.

Standard 2d: In the Punnett Square below, what percentage of the offspring will have purple flowers?

A 25%B 50%C 75%D 100%

Standard 2d: In the Punnett Square above, what percentage of the offspring will have purple flowers?

Answer:A 25%

Standard 2d: In the Punnett Square below, what percentage of the offspring are capable of passing on either the trait for white flowers or

the trait for purple flowers to their offspring?

A 25%B 50%C 75%D 100%

Standard 2d: In the Punnett Square below, what percentage of the offspring are capable of passing on either the trait for white flowers or

the trait for purple flowers to their offspring?

Answer: B 50% because Ww can

pass on a W (white flower gene) or a w (purple flower gene)

Standard 2c: Some people have hair on the middle segment of each finger and some people do not. This characteristic is under

genetic control. Which of the following statements is true?

A The hair results from a mutation.

B Each person has two or more alleles for this trait.

C The genes that cause this trait are codominant.

D The genes that cause this trait are unknown.

Standard 2c: Some people have hair on the middle segment of each finger and some people do not. This characteristic is under

genetic control. Which of the following statements is true?

Answer:B Each person has two

or more alleles for this trait.

Standard 2e: The diagram shows

A DNA.B RNA.C proteins.D ribosomes.

Standard 2e: The diagram shows

Answer:A DNA.

Standard 2d: Scientists call an organism that has two different alleles for a trait (Tt)

A a hybrid.B homozygous.C purebred.D a factor.

Standard 2d: Scientists call an organism that has two different alleles for a trait (Tt)

Answer:A a hybrid.

Standard 2e: What is DNA?

A an energy-rich organic

compound made of carbon, hydrogen, and oxygen

B a drug that slows down the activity of the central nervous system

C the genetic material that is passed from parent to offspring

D the region of a cell located inside the cell membrane in prokaryotes

Standard 2e: What is DNA?

Answer:C the genetic material

that is passed from parent to offspring

Standard 2e: Which of the following is made up of strands of DNA?

A alleleB chromosomeC geneD nucleus

Standard 2e: Which of the following is made up of strands of DNA?

Answer:B chromosome

Standard 2e: Which of the following are found in the nucleus of a cell?

A chloroplastsB chromosomesC Golgi apparatusD mitochondria

Standard 2e: Which of the following are found in the nucleus of a cell?

Answer:B chromosomes

Standard 2b: At the end of mitosis, chromosomes provide each daughter cell with

A half the parent’s genetic material.B an exact copy of the parent’s genetic material.C twice the amount of the parent’s genetic material.D four times the amount of the parent’s genetic material.

Standard 2b: At the end of mitosis, chromosomes provide each daughter cell with

Answer:B an exact copy of the parent’s genetic

material.

Standard 2e: As a result of mitosis in a human body cell, each of the two nuclei formed has which of the following?

A 12 chromosomesB 92 chromosomesC 23 chromosomesD 46 chromosomes

Standard 2e: As a result of mitosis in a human body cell, each of the two nuclei formed has which of the following?

Answer:D 46 chromosomes

Standard 2e: Down Syndrome is a genetic condition caused by an extra #21 chromosome, giving a person an abnormal total of 47 chromosomes.

Standard 2d: Given: Widow’s peak is dominant (W) No widow’s peak is recessive (w)

What would be the phenotype of a child that has Ww?

A widow’s peak B no widow’s peak C maleD female

Standard 2d: Given: Widow’s peak is dominant (W) No widow’s peak is recessive (w)

What would be the phenotype of a child that has Ww?

Answer:A widow’s peak