Genetics Quiz 2

Question 1

Karyotypes

Answer 1

a display of an individuals chromosomes arranged in homologous pairs
Mitotic metaphase chromosomes
Interrupted at metaphase to stop the steps of mitosis from taking place

Question 2

Autosomal chromosomes

Answer 2

Chromosomes 1-22 (homologous)

Question 3

Sex chromosomes

Answer 3

Chromosome 23
XX or XY
not homologous in males

Question 4

Nondisjunction

Answer 4

The failure of a pair of chromosomes to properly separate during meiosis

Question 5

Monosomy

Answer 5

Loss of one autosome
Doesn’t support life

Question 6

Trisomy

Answer 6

Gain of one autosome
Support life for a time

Question 7

Trisomy 13

Answer 7

Impaired growth and mental development

Question 8

Trisomy 13 conditions

Answer 8

Malformed ears
Absence eyes
Cleft lip and palate
Polydactyl
Hand clench
Rocker bottom

Question 9

Trisomy 18

Answer 9

Development disabilities with a failure to thrive

Question 10

Trisomy 18 conditions

Answer 10

Receding jaw
Low set ears
Hand clench
Rocker bottom

Question 11

Trisomy 21

Answer 11

Affects mental development
Short in stature with poor muscle tone

Question 12

Trisomy 21 conditions

Answer 12

Fold of eye
Small and round head
Protruding tongue

Question 13

Trisomy 21 name

Answer 13

Down syndrome

Question 14

Trisomy 18 name

Answer 14

Edward’s syndrome

Question 15

Trisomy 13 name

Answer 15

Patau syndrome

Question 16

Causes of nondisjunction

Answer 16

Radiation
Viruses
Drugs
Age of parent

Question 17

XXX

Answer 17

Sterile but usually normal otherwise

Question 18

X turner syndrome

Answer 18

Sterile
Short webbed neck
Underdeveloped sex organs
Low mental development

Question 19

XYX Klinefelter syndrome

Answer 19

Sterile
Tall
Thin
Long legs
Female body characteristics

Question 20

Y

Answer 20

No viable

Question 21

XYY

Answer 21

Normal males
Aggressive behaviour
Tall