Chapter 13

Question 1

The chromosome designation 11p refers to

Answer 1

the short arm of chromosome 11

Question 2

E.Coli genomic DNA differs from a eukaryotic chromosome in that E.coli Dna

Answer 2

is circular

Question 3

For a species with a diploid number of 18, indicate how many chromosomes will be present in somatic nuclei of individuals that are trisomic?

Answer 3

19

Question 4

What is the general term for a condition in which the chromosome number is not a multiple of a complete set?

Answer 4

aneuploidy

Question 5

The condition that exists when an organism gains or loses one or more chromosomes but not a complete haploid set is known as ________.

Answer 5

aneuploidy

Question 6

What is the specific term that describes the loss of a single chromosome (2n - 1)?

Answer 6

monosomy

Question 7

Which genetic disease is caused by a trisomy for chromosome 13?

Answer 7

Palau syndrome

Question 8

Which genetic disease is caused by a trisomy for chromosome 18?

Answer 8

Edwards syndrome

Question 9

Which term specifically refers to the gain of extra chromosome sets from individuals of the same species?

Answer 9

autopolyploidy

Question 10

A plains zebra has 44 chromosomes. A donkey has 62 chromosomes. Zedonks are a hybrid of a female plains zebra and a male donkey (really). How many chromosomes would a somatic cell in a zedonk have?

Answer 10

53

Question 11

Regions of the chromosome with relatively few functional genes are called

Answer 11

hererochromatin

Question 12

Telomeres are located at the ends of

Answer 12

eukaryotic chromosomes

Question 13

A chromosome with its centromere in the middle is a

Answer 13

metacentric

Question 14

Except for Down syndrome (trisomy 21), Patau syndrome (trisomy 13) and Edwards syndrome (trisomy 18), no other autosomic aneuploidies have been detected in live births. This is because

Answer 14

Aneuploidies occur for each of the autosomes but most of the affected fetuses do not survive to term