WGU C653 Heredity and Genetics EXAM
(New 2026/ 2027 Update) Questions &
Answers {Grade A} 100% Correct (Verified
Solutions)
A change occurs in one nucleotide of a triplet within a protein-coding portion of a gene.
This change results in a new triplet that codes for a stop codon. What is this mutation
called? - Correct answer Nonsense mutation
A point mutation occurs in which a single nucleotide change results in a codon that
codes for a different amino acid. What is this mutation called? - Correct answer
Missense mutation
A single nucleotide is changed. What is this mutation called? - Correct answer Point
mutation
A point mutation occurs in which a single nucleotide change results in a codon that
codes for the same amino acid. What is this mutation called? - Correct answer Sense
mutation
, Which type of mutation is commonly linked to DNA breakage? - Correct answer
Radiation exposure
Which type of mutation can cause nucleotide substitutions, change the number of
nucleotides, or structurally change the nucleotides? - Correct answer Chemical
modification
How many chromosomes are present in a trisomal karyotype of somatic cells if the
gamete cells of a diploid organism have 23 chromosomes? - Correct answer 47
How many chromosomes are present in a triploidal karyotype of somatic cells if the
gamete cells of a diploid organism have 23 chromosomes? - Correct answer 69
What is 5n an example of? - Correct answer Polyploidy
What is 2n + 3 an example of? - Correct answer Pentasomy
(New 2026/ 2027 Update) Questions &
Answers {Grade A} 100% Correct (Verified
Solutions)
A change occurs in one nucleotide of a triplet within a protein-coding portion of a gene.
This change results in a new triplet that codes for a stop codon. What is this mutation
called? - Correct answer Nonsense mutation
A point mutation occurs in which a single nucleotide change results in a codon that
codes for a different amino acid. What is this mutation called? - Correct answer
Missense mutation
A single nucleotide is changed. What is this mutation called? - Correct answer Point
mutation
A point mutation occurs in which a single nucleotide change results in a codon that
codes for the same amino acid. What is this mutation called? - Correct answer Sense
mutation
, Which type of mutation is commonly linked to DNA breakage? - Correct answer
Radiation exposure
Which type of mutation can cause nucleotide substitutions, change the number of
nucleotides, or structurally change the nucleotides? - Correct answer Chemical
modification
How many chromosomes are present in a trisomal karyotype of somatic cells if the
gamete cells of a diploid organism have 23 chromosomes? - Correct answer 47
How many chromosomes are present in a triploidal karyotype of somatic cells if the
gamete cells of a diploid organism have 23 chromosomes? - Correct answer 69
What is 5n an example of? - Correct answer Polyploidy
What is 2n + 3 an example of? - Correct answer Pentasomy
