KE REVIEW~ UNIT 6

Which statement about sex-linked traits is true?

• The Y chromsome carries many genes.

• The X chromosome has very few genes for traits other than sex.

• Sex-linked traits are caused by genes located on the Y chromosome.

• Recessive sex-linked traits appear more often in males than in females.

New technologies enable oils to be extracted from plants to make renewable biodiesel fuel. Scientists have altered the genome of a specific plant species to increase the amount of oil produced by each plant. Which statement explains why this technology most likely benefits farmers?

• It makes each plant more resistant to disease.

• It lowers the cost of each acre of plants cultivated.

• It increases the value of each acre of land cultivated.

• It eliminates the processing needed to extract plant oils.

Tags

NGSS.HS-ETS1-3

A genetic mutation involving a single base causes an error that affects the sequence of the next 500 amino acids in a protein. Which type of mutation could have produced this type of error in the protein?

• silent

• nonsense

• frame-shift

• substitution

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2

During a cell division cycle, chromosome segments from two homologous chromosomes exchange places. Which result is most likely to occur following this cycle?

• Genetic material will be lost.

• The number of chromosomes will increase.

• The total number of genes in the cell will decrease.

• A change in gene location will occur on both chromosomes.

Which effect is most likely caused by nondisjunction during meiosis?

• an increase in nuclei

• an extra chromosome

• only two types of nitrogenous bases

• increased survival benefits from traits

Which statement best describes how organisms use DNA and amino acids to synthesize a protein?

• DNA is transcribed into mRNA, which is translated by the ribosome to produce an amino acid chain.

• DNA is translated into mRNA, which is transcribed by the ribosome to produce an amino acid chain.

• Amino acids are transcribed into mRNA, which is translated in the nucleus to produce a molecule of DNA.

• Amino acids are translated into mRNA, which is transcribed in the nucleus to produce a molecule of DNA.

Tags

NGSS.HS-LS1-1

Which form of genetic engineering was used by humans for many years before the discovery of DNA?

• gene slicing

• gene insertion

• animal cloning

• selective breeding

Which activity would a cell be unable to perform if a mutation occurred that caused the Golgi apparatus to stop functioning?

• packaging proteins for transport out of the cell

• processing mRNA as it is transcribed from DNA strands

• providing the location for the delivery of amino acids by tRNA

• producing a template to guide the sequencing of amino acid chains

A mutation occurs at the midpoint of a gene, altering all amino acids encoded after the point of mutation. Which mutation could have produced this change?

• deletion of two nucleotides

• deletion of three nucleotides

• insertion of six nucleotides

• insertion of twelve nucleotides

Tags

NGSS.HS-LS3-2

Which statement describes how cloning is different from selective breeding?

• Cloning eliminates recessive alleles from a genome.

• Cloning transforms harmful traits into beneficial traits.

• Cloning corrects or replaces mutated gene sequences.

• Cloning results in offspring genetically identical to the parents.