CH 6-9 worksheet

Question 1

What is the total number of chromosomes in a triploid organism with n = 5?

Answer 1

15 chromosomes

Question 2

What is the total number of chromosomes in a tetraploid organism with n = 5?

Answer 2

20 chromosomes

Question 3

What is the total number of chromosomes in a diploid organism with n = 5?

Answer 3

10 chromosomes

Question 4

What is the total number of chromosomes in a hexaploid organism with n = 5?

Answer 4

30 chromosomes

Question 5

What type of translocation is characterized by breaks between E and F and P and Q?

Answer 5

Reciprocal translocation

Question 6

What type of translocation involves breaks between A and B, C and D, and N and O?

Answer 6

Non-reciprocal interstitial translocation

Question 7

How many copies of each gene would an autotetraploid organism have?

Answer 7

Four copies

Question 8

What are the five possible genotypes for alleles A and a in an autotetraploid organism?

Answer 8

• AAAA
• AAAa
• AAaa
• Aaaa
• aaaa

Question 9

If the A allele is dominant, how many possible phenotypes would you expect?

Answer 9

Two phenotypes

Question 10

True or False: The proteins that make up part of the nucleosome are called single-stranded binding proteins.

Answer 10

False

Question 11

True or False: The degree of packing of euchromatin changes throughout the cell cycle.

Answer 11

True

Question 12

True or False: The bonds that connect nucleotides within a strand are called hydrogen bonds.

Answer 12

False

Question 13

What forms phosphodiester bonds between adjacent nucleotides?

Answer 13

DNA ligase

Question 14

Where are centromeres located?

Answer 14

At the constricted region of chromosomes

Question 15

DNA replication initiates at _______.

Answer 15

[origin of replication]

Question 16

What is the percentage of guanine in a DNA sample if adenine is 30%?

Answer 16

20%

Question 17

How many DNA molecules are there in a replicated chromosome?

Answer 17

Two DNA molecules

Question 18

What is a nitrogenous base combined with a sugar called?

Answer 18

[nucleoside]

Question 19

How many hydrogen bonds are between adenine and guanine?

Answer 19

Three hydrogen bonds

Question 20

Write the complementary DNA strand for the sequence 3’ AGGCATGTTACAGTTGC 5’.

Answer 20

5’ TCCGTACAATGTCAACG 3’

Question 21

What are the components to label in a DNA replication diagram?

Answer 21

• origins of replication
• Okazaki fragments
• lagging strands
• leading strands
• RNA primers
• 5’ and 3’ ends of all DNA strands
• helicases
• topoisomerases