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Heredity & Genetics C652 actual Exam questions and answers 2025 latest update.
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Heredity & Genetics C652 actual Exam questions and answers 2025 latest update.
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Heredity & Genetics C652 actualExam questions and answers
2025 latest update.
Triploidy - answer is a rare chromosomal abnormality in which
fetuses are born with an extra set of chromosomes in their cells.
Three sets, or 69 chromosomes
missense - answer a single nucleotide change results in a codon
that codes for a different amino acid
nonsense - answer in a sequence of DNA that results in a
premature stop codon
point mutation or substitution - answer is a genetic mutation
where a single nucleotide base is changed, inserted or deleted from
a sequence of DNA or RNA.
alleles - answer various forms of the same gene
genotype - answer genetic makeup of a cell
phenotype - answer An organism's physical appearance, or visible
traits.
base analog replacement - answer are chemicals that mimic bases
to such an extent that they can be incorporated into DNA in place of
one of the normal bases but in doing so lead to an increase in the
rate of mutation.
, radiation exposure - answer As radiation strikes the molecules in
cells, it creates charged atoms called ions. Such ionized molecules
are highly reactive and can cause mutations in DNA. Because cells
are about 80% water, radiation often splits water into hydrogen ions
and hydroxyl radicals. Free radicals can produce mutations if they
interact with DNA. Breakage of DNA.
tautomeric shift - answer The spontaneous isomerization of a
nitrogen base to an alternative hydrogen-bonding form, possibly
resulting in a mutation. Reversible shifts of proton position in a
molecule.
chemical modifications of nucleotides - answer Chemical mutagens
can modify bases in DNA and alter their base-pairing properties
tetraploidy - answer containing four homologous sets of
chromosomes
trisomy - answer a condition in which an extra copy of a
chromosome is present in the cell nuclei, causing developmental
abnormalities. 47 chromosomes
monosomy - answer Absence of one chromosome of a pair of
homologous chromosomes.
polyploidy - answer possession of more than two sets of
homologous chromosomes.
What is the purpose of DNA sequencing? - answer To determine the
order of nucleotide bases
Which process is used to create DNA sequences that have not
naturally occurred in organisms? - answer DNA recombination
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