Lecture 2

Question 1

Aneuploidy

Answer 1

The occurance of one or more extra or missing chromosomes in a cell or organism

Question 2

Trisomy

Answer 2

the presence of 3 chromosomes instead of the usual 2

Question 3

Nondisjunction

Answer 3

Failure of the chromosomes to separate; produces daughter cells with abnormal numbers of chr

Question 4

Karyotype

Answer 4

an individual’s complete set of chromosomes

Question 5

Tripoloidy

Answer 5

3n; rare condition where a cell has 69 total chr instead of 46 (2n)

Question 6

Gametogenesis

Answer 6

production of gametes from haploid precursor cells

Question 7

Kinetochore

Answer 7

A complex of proteins associated with the centromere of a chromosome during cell division, to which the microtubules of the spindle attach

Question 8

Choesion

Answer 8

the attraction of molecules for other molecules of the same kind

Question 9

Recombination

Answer 9

process by which pieces of DNA are broken and recombined to produce new combinations of alleles