Genetics: Analysis and Principles Exam
Questions With Correct Answers
Genetic variation refers to - answer✔✔differences between members of the same species or
those of different species
Allelic variations are due to - answer✔✔mutations in particular genes
Chromosomal aberrations are substantial changes in chromosome structure - answer✔✔These
typically affect 1+ gene. They're also called chromosomal mutations
A change in chromosome number is called a - answer✔✔genome mutation. It's the result of
changes in # of: Sets of chromosomes OR #s of individual chromosomes in a set
VARIATION IN CHROMOSOME STRUCTURE - answer✔✔The study of chromosomal
variation is important for several reasons
The study of chromosomal variation is important for several reasons: 1.Can have big effects on
phenotype of an.. - answer✔✔organism 2.Can have big effects on phenotype of offspring of an
organism 3. Been important in evolution of species
Cytogenetics - answer✔✔The field of genetics that involves the microscopic examination of
chromosomes
Cytogeneticist - answer✔✔examines the chromosomal composition of a particular cell/organism
Cytogeneticist allows - answer✔✔detection of individuals with abnormal chromosome #/
structure. Also provides a way to distinguish between species
Cytogeneticists use 3 main features to identify & classify chromosomes - answer✔✔1. Sizen 2.
Location of the centromere n 3. Banding patterns
These features are all seen in a - answer✔✔Karyotype
Cytogenetics: For detailed identification, chromosomes are ... - answer✔✔treated with stains to
produce characteristic banding patterns. e.g G-banding
G-banding:Chromosomes are exposed to dye Giemsa.Some regions bind dye... -
answer✔✔heavily(Dark bands).Some don't bind stain well(Light bands). Humans(300G bands-in
metaphase&2000G bands - prophase)
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