Unit two: Genes and Heredity

Question 1

Which part is in the link between both arms of the chromosomes

Answer 1

centromere

Question 2

Corn plants have a haploid number of 10. How many chromosomes are in a corn leaf cell at the end of anaphase?

Answer 2

Anaphase is 4n so 4x10= 40 chromosomes

Question 3

Which cell cycle stages have ds chr at the end of the stage?

Answer 3

prophase, prometaphase and metaphase. (s-phase and G2)

Question 4

Corn plants have a haploid # of 10. what is the ploidy level of a corn leaf at metaphase.

Answer 4

2n

Question 5

What is the haploid # in a cell with two same ds chr, two same ds chr and one lone ds chr?

Answer 5

haploid number is the # of different types of chr so 3.

Question 6

How many chromatids are present in a cell with 6 ds chr

Answer 6

12 chromatids

Question 7

How many chromatids are present in a cell with 7 ds chr?

Answer 7

14 chromatids

Question 8

Metaphase, haploid # of 3, identify the error if the cell has 3 different pairs of ds chromosomes randomly in the cell

Answer 8

In metaphase the cells should be align at the equator, wrong arrangement of the chr

Question 9

Metaphase, haploid #3, identify the error is the chr are at the equator with 3 different pairs of ss chr

Answer 9

Should be ds stranded (wrong type of chr)

Question 10

Match the term with its definition:

Cylinder composed of microtubules

Answer 10

centrioles

Question 11

Match the term with its definition:

Highly condensed area of the chr, appears as a constriction

Answer 11

Centromere

Question 12

organelle that creates a microtubule

Answer 12

centrosomes

Question 13

Match the term with its definition:

Doudle stranded linear DNA molecule

Answer 13

chromosomes

Question 14

Match the term with its definition:

One DNA molecule in a ds chr

Answer 14

chromatids

Question 15

Match the term with its definition:

DNA-histone protein compex

Answer 15

chromatin

Question 16

Match the term with its definition:

Proteins that hold sister chromatids together

Answer 16

cohesin

Question 17

Match the term with its definition:

Proteins that help chromatin condense into chr

Answer 17

condensin

Question 18

Match the term with its definition:

Protein found in chromatin

Answer 18

histones

Question 19

Match the term with its definition:

Required for cells to duplicate chr

Answer 19

SPF (S-phase promoting factor)

Question 20

Match the term with its definition:

Required for the assembly of microtubules into spindle fibers

Answer 20

MPF (Mitosis promoting factor)

Question 21

Match the term with its definition:

required for sister chromatids to separate

Answer 21

APC (Anaphase promoting complex)