AP Bio Unit 5 Review

Suppose that in sheep, a dominant allele (B) produce black hair and a recessive allele (b) produce white hair. If you saw a black sheep, you would be able to identify

• its phenotype for hair color

• its genotype for hair color

• the genotype of only one of its parents

• the phenotype of both of its parents

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NGSS.HS-LS3-1

In humans, hemophilia is an X-linked recessive trait. If a man and a woman have a son who is affected with hemophilia, which of the following is definitely true?

• The mother carries an allele for hemophilia
• The father carries an allele for hemophilia
• The father is afflicted with hemophilia
• both parents carry an allele for hemophilia

Tags

NGSS.HS-LS3-1

In peas, the trait for tall plants is dominant (T) and the trait for short plants is recessive (t).  The trait for yellow seeds is dominant (Y) and the trait for green seeds is recessive (y).
A cross between two plants results in 292 tall, yellow plants and 103 short, green plants.  What are the most likely genotypes of the parents?

• TtYY x Ttyy
• TTYy x TTYy
• TTyy x TTYy
• TtYy x TtYy

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

If 2n = 48 for a particular cell, then the chromosome number in each cell after meiosis would be

• 96

• 48

• 24

• 12

The pedigree of a family with a history of a particular genetic disease is shown below. Squares represent males and circles represent females. Shaded symbols represent those who have the disease.

If Individual 2 were to marry a woman with no family history of the disease, which of the following would most likely be true of their children?

• All of the children would have the disease.

• None of the children would have the disease

• Only the sons would have the disease

• All of the sons would be carriers of the disease

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The pedigree of a family with a history of a particular genetic disease is shown below. Squares represent males and circles represent females. Shaded symbols represent those who have the disease

If Individual 6 marries a woman with the disease, what is the probability that their first child will have the disease?

• 0

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

In garden peas, a single gene controls stem length. The recessive allele (t) produces short stems when homozygous. The dominant allele (T) produces long stems. A short-stemmed plant is crossed with a heterozygous long-stemmed plant. Which of the following represents the expected phenotypes of the offspring and the ratio in which they will occur?

• 3 long-stemmed plants: 1 short-stemmed plant

• 1 long-stemmed plant: 1 short-stemmed plant

• 1 long-stemmed plant: 3 short-stemmed plants

• Long-stemmed plants only

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In most vertebrates, the sperm cell normally contributes which of the following to the new organism?

• Many mitochondria

• Significant amounts of RNA

• A haploid complement of chromosomes

• Most of the cytoplasm of the zygote

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NGSS.HS-LS1-3

NGSS.HS-LS3-1

The process depicted in the image above is best summarized by which of the following descriptions?

• During the synthesis phase of the cell cycle, DNA molecules replicate to generate identical daughter cells

• Centromeres align specific gene sequences of homologous chromosomes during mitotic divisions.

• The spindle apparatus attaches at chiasma during metaphase of mitosis.

• During meiosis, crossing over leads to recombination of alleles between homologous chromosomes

Tags

NGSS.HS-LS3-2

If the parents of a cross are AaBcCc x aaBBcc. What is the probability of an offspring that is homozygous recessive for all 3 traits?

• 1/64
• 1/32
• 1/8
• O

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3