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Genetics Analysis And Principles 6th Edition By Robert Brooker 9781259616020 ALL Chapters .
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Test Bank For Genetics Analysis And Principles 6th Edition ByRobert Brooker 9781259616020 ALL Chapters .
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)
Cytogenetics The banding pattern is useful in several ways: - ANSWER: 1.Distinguishes Individual
chromosomes from each other 2. Detects change in chromosome structure
Cytogenetics The banding pattern is useful in several ways: 3. - ANSWER: Reveals evolutionary
relationships among chromosomes of closely-related species
Mutations Can Alter Chromosome Structure - ANSWER: There are 2 primary ways in which structure
of chromosomes can be altered
There are 2 primary ways in which structure of chromosomes can be altered - ANSWER: 1.Total
amount of genetic info in chromosome can change 2.Genetic material remains same, but is
rearranged
1. Total amount of genetic info in the chromosome can change - ANSWER: Deficiencies/Deletions and
Duplications
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