Lecture 3

Question 1

Metacentric Chromosome

Answer 1

more or less central chromosome and arms of approximately equal length

Question 2

Acrocentric Chromosome

Answer 2

centromere near one end

Question 3

Submetacentric Centric

Answer 3

off-center centromere and arms of clearly different lengths

Question 4

Translocation

Answer 4

the exchange of chromosome segments between two chromosomes

Question 5

Robertsonian Translocation

Answer 5

Two acrcentric chromosomes that fuse near the centromere region with loss of the short arms. Only 45 chr but stil balanced

Question 6

Reciprocal Translocation

Answer 6

results from the breakage or recombinationinvolving nonhomologous chromosomes, with reciprocal exchange of the broken-off or recombined segments. Usually only 2 chr involved, usually w/out phenotypic effects

Question 7

Balanced Translocation

Answer 7

reciprocal, the exchange of genetic material between two nonhomologous chromosomes, or Robertsonian, the fusion of two acrocentric chromosomes

Question 8

Unbalanced Translocation

Answer 8

loss of a part of one chromosome and/or a gain of part of one chromosome

Question 9

Inversion

Question 10

Pericentric Inversion

Question 11

Paracentric Inversion

Question 12

Centromere

Question 13

Isochromosome

Question 14

Ring chromosome

Question 15

P arm

Question 16

q arm

Question 17

Telomere