6.6 Karyotypes

Question 1

What is a karyotpe?

Answer 1

An image of chromosomes from a cell arranged in an organised matter that can identify chromosome abnormalities

Question 2

What is a cytogeneticist?

Answer 2

A scientist who specialised in the study of human karyotypes

Question 3

What is down syndrome?

Answer 3

A chromosomal disorder where an extra n21 chromosome from a seperate chromosme (trisomy) or attached to another chromosome (translocation DS)

Question 4

What is deletion?

Answer 4

A type of chromosome change in which part of a chromosome is lost

Question 5

What changes can occur in chromosomes?

Answer 5

-changes in total number of chromosomes
-changes involving part of one chromosome
-changed arrangements of chromosomes

Question 6

What is trisomy?

Answer 6

3 copies of a chromosome instead of a pair

Question 7

What is monosomy?

Answer 7

One member of a pait of chromosomes is missing; causes embryotic death except when involved with allosomes

Question 8

What is nondisjunction?

Answer 8

The failure of one or two pairs of chromosomes to seperated during division

Question 9

What is duplication?

Answer 9

When part of a chromosome is duplicated

Question 10

What is translocation?

Answer 10

When part of a chromosomes relocate and connect with another chromosme

Question 11

Name 3 features to identify homologous chromosomes

Answer 11

-Same centromere position
-Same loci; same pattern of gene
-Same length/size
One homologous chromosome is inherited from mum and the other from dad