Mitosis/Meiosis

Question 1

what are homologous chromosomes?

Answer 1

They are the 23 chromosomes that your mother and father will each give you.

Question 2

What is Synapsis?

Answer 2

pairing of two homologous chromosomes that occur during meiosis

Question 3

What is interphase?

Answer 3

The period where chromosomes duplicate and prepare for cell division majority of time is spent in this phase

Question 4

what is prophase

Answer 4

Chromosomes shorten and condense into visible structures. Nuclear membrane begins to break down centrolies begin to move to opposite poles. Spindle fibers begin to form. nucleous disappears

Question 5

What is Metaphase?

Answer 5

The Chromosomes line up across the equatorial plate and attach to spindle fibers

Question 6

What is Anaphase

Answer 6

Sister chromatids separate and move to opposite poles of the cell. Cell begins to
cleave

Question 7

What is Telophase

Answer 7

The chromosomes reach opposite ends of the cell and begin to lengthen and intertwine. Spindle fibers dissolve and a nuclear membrane begins to form around each mass of chromatin. Nucleolus
reappears

Question 8

What is Prophase I

Answer 8

Homologous
chromosomes have duplicated and consists of sister chromatids. The nuclear membrane begins to dissolve
and centrioles move towards opposite poles of the cell. They will provide attachment sites for spindle fibers
which help guide the chromosomes to opposite poles of
the cell. The chromosomes line up with their homologous pair and are called a tetrad. Crossing over may occur

Question 9

What is Metaphase I

Answer 9

The homologous chromosomes line up across the equatorial plate. They are attached to
spindle fibers in preparation for migration to opposite poles

Question 10

What is Anaphase I

Answer 10

Homologous pairs are guided to opposite poles of the cell. Cell begins to cleave

Question 11

What is Telophase I

Answer 11

The nuclear membrane starts to reappear and the mother cell cleaves into two daughter cells each with 23 chromosomes existing as sister chromatids

Question 12

What is Prophase II

Answer 12

The nuclear membranes begin to dissolve and centrioles move to opposite poles of the cells as the spindle fibers begin to form

Question 13

What is Metaphase II

Answer 13

The chromosomes line up along the equatorial plate in single file and become attached to the spindle fibers.

Question 14

What is Anaphase II

Answer 14

The sister chromatids are pulled apart towards opposite poles of the cell. The cells begin to cleave

Question 15

What is Telophase II

Answer 15

The cells cleave into daughter cells again, this time with 23 chromosomes each

Question 16

What is Nondisjunction

Answer 16

occurs when two homologous chromosomes move to the same pole during meiosis. The resulting cells will have either 22 or 24 chromosomes. If these sex cells combine with another sex cell with 23 chromosomes, the resulting zygote will have either 45 or 47 chromosomes. The condition arising from one extra chromosome is called trisomy and one less chromosome is called monosomy