Genetics review

Which of the following is not a source of genetic variation?

• Crossing over

• Mutations

• Complimentary base pairing

• Independent assortment

Which of the following is not a valid codon?

• ATT

• CBG

• GCT

• AAG

Which of the following are not associated with DNA structure?

• nucleotides

• amino acid sequence

• hydrogen bonds

• double helix

True or False: Mitosis introduces genetic variety into gametes.

• True

• False

What term describes a pair of chromosomes that contain the same set of genes?

• homologous chromosomes

• Homoerectus chromosomes

• karyotype

• genotype

Which of the following best describes the difference between alleles of the same gene?

• Slight differences in the amino acid sequence.

• Slight differences in the sugar-phosphate backbone.

• Slight differences in the genotype.

• Slight differences in the base sequence.

Which of the following parental genotypes will give a 50% chance of an homozygous recessive genotype?

• Aa & AA

• Aa & aa

• aa & aa

• AA & AA

Which of the following parental genotypes will give a 25% chance of an homozygous recessive genotype?

• Aa & AA

• Aa & aa

• aa & aa

• Aa & Aa

Which of the following does not relate to mutations?

• DNA replication

• UV radiation

• Inheritance of alleles

• Mismatching