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Genetics Ch. 6 and 7 > Karyotypes > Flashcards

Flashcards in Karyotypes Deck (14)
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1

Karyotype

Characteristics chromosome complement of a eukaryote species

2

In normal autosomal chromosomes

Present in 2 identical copies
May or may not be sex chromosomes

3

Polyploid Cells

Multiple copies of chromosomes and haploid cells have single copies

4

Karyology

The study of whole sets of chromosomes
Nuclei and chromosomes inside

5

Traditional process for karyotyping

Adding a dye to metaphasic chromosomes

6

Different dyes that affect of the chromosomes are used for

range of identification purposes
Such as diagnosing Down Syndrome

7

One common dye used is

Giemsa

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Giemsa is the process known as

G-Banding

9

Why is the dye effective?

It markedly stains the bands on a chromosome

10

Each chromosome can be identified by

Banding pattern
Result is similar overall gray values for each a chromosome

11

Karyogram or idiogram

In pairs, ordered by size and position of centromere for chromosomes of the same size

12

New karyotyping methods

Fluorescent dyes that bind to specific regions of chromosome

13

By using series of specific probes each with varying amounts of dyes

Different pairs of chromosomes have unique spectral characteristics

14

Pairing of the chromosome is simpler because....

Homologous pairs are the same color and aberrations and cross-overs are more easily recognizable