bio 11

22問 • 1年前

問題一覧

In humans, the allele for having a straight thumb is dominant to the allele for having a curved thumb. A male is homozygous dominant for straight thumbs, and a female has curved thumbs. What is the probability that their offspring has curved thumbs?

In mice, colored coat is dominant (C) to white coat (c). Short legs (S) are dominant to long legs (s). Which of the following genotypes represents a white mouse with short legs?

ccSS

Two dogs are shown. Which claim about reproduction in dogs can best be supported using a valid argument?

Gametes from both dogs are needed to maintain the correct number of chromosomes in the offspring.

ABO blood type is controlled by three alleles of a single gene. Blood type O is associated with the recessive I allele. Blood types A, B, and AB are associated with the codominant IA and IB alleles. The pedigree shows the inheritance of ABO blood types in a family. Which two genotypes are possible for the individual indicated with the question mark?

i I^A, I^A I^B

A pedigree for a family reveals the following data. Which statement best explains the data?

The trait is autosomal recessive.

In fruit flies, red eye color (R) is dominant to white eye color (r). The allele for eye color is carried on the X-chromosome. Which cross would most likely produce 50% white-eyed males and 50% red-eyed females?

X^r X^r x X^R Y

What type of inheritance does human ABO blood type show (choose 2).

mulit-allele, codominant

What are the possible genotypes for individual II-2 (choose 3)

ii, IAi, IBi

If individual II-7 and II-8 had another child, what blood type could the child have?

B and AB

A mutation of a protein results in protection against destructive bacteria.

beneficial effect (A)

A mutation occurs in a non-coding portion of DNA and does not change the amino acid sequence of a protein.

neutral effect (B)

A mutation in the hemoglobin gene can result in sickle cell anemia.

harmful effect (C)

Over time, a population of green lizards that live in a desert with white sand become much lighter in color.

beneficial effect (A)

A gene has a substitution in its DNA—a T is replaced with a C.

cannot be determined (D)

DNA fingerprinting is a laboratory technique used to establish a link between biological evidence and a suspect in a criminal investigation. A DNA sample taken from a crime scene is compared with a DNA sample from a suspect. During a crime scene investigation, forensic technicians collected skin samples from under the fingernails of a murder victim. Using DNA evidence, police narrowed their search down to three suspects. Comment on the evidence.

Suspect #2 is a match to the DNA evidence found on the victim.

Which of these characteristics best describe a difference between eukaryotic and prokaryotic cells?

Eukaryotic cells are usually larger and more complex than prokaryotic cells.

Gel electrophoresis is often used to study evolutionary relationships of species. The diagram to the right shows the results of gel electrophoresis for four different animals: A, B, C, D. Which species has the most DNA in common with species A?

Species C

Which of the following best describes why viruses are characterized as non-living?

they are not made of cells

A technique known as polymerase chain reaction (PCR) is able to produce millions of copies of a DNA molecule in only a few hours. Which of the following cellular processes is PCR most similar to?

Replication

Based on the chemical bonds present in this molecule, we would classify it as a(n)

Unsaturated fat

Which of the following is used to digest DNA?

restriction endonucleases

If you are stranded on a desert island, it is not advisable to drink sea water. Why not?

The salt in the body creates a hypertonic solution around cells, which causes water to diffuse out of cells and make them shrink.

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bio 13

ユーザ名非公開 · 24問 · 11ヶ月前

bio 13

24問 • 11ヶ月前

ユーザ名非公開

問題一覧

In mice, colored coat is dominant (C) to white coat (c). Short legs (S) are dominant to long legs (s). Which of the following genotypes represents a white mouse with short legs?

ccSS

Two dogs are shown. Which claim about reproduction in dogs can best be supported using a valid argument?

Gametes from both dogs are needed to maintain the correct number of chromosomes in the offspring.

i I^A, I^A I^B

A pedigree for a family reveals the following data. Which statement best explains the data?

The trait is autosomal recessive.

X^r X^r x X^R Y

What type of inheritance does human ABO blood type show (choose 2).

mulit-allele, codominant

What are the possible genotypes for individual II-2 (choose 3)

ii, IAi, IBi

If individual II-7 and II-8 had another child, what blood type could the child have?

B and AB

A mutation of a protein results in protection against destructive bacteria.

beneficial effect (A)

A mutation occurs in a non-coding portion of DNA and does not change the amino acid sequence of a protein.

neutral effect (B)

A mutation in the hemoglobin gene can result in sickle cell anemia.

harmful effect (C)

Over time, a population of green lizards that live in a desert with white sand become much lighter in color.

beneficial effect (A)

A gene has a substitution in its DNA—a T is replaced with a C.

cannot be determined (D)

Suspect #2 is a match to the DNA evidence found on the victim.

Which of these characteristics best describe a difference between eukaryotic and prokaryotic cells?

Eukaryotic cells are usually larger and more complex than prokaryotic cells.

Species C

Which of the following best describes why viruses are characterized as non-living?

they are not made of cells

A technique known as polymerase chain reaction (PCR) is able to produce millions of copies of a DNA molecule in only a few hours. Which of the following cellular processes is PCR most similar to?

Replication

Based on the chemical bonds present in this molecule, we would classify it as a(n)

Unsaturated fat

Which of the following is used to digest DNA?

restriction endonucleases

If you are stranded on a desert island, it is not advisable to drink sea water. Why not?

The salt in the body creates a hypertonic solution around cells, which causes water to diffuse out of cells and make them shrink.