meiosis process
Which of the following is a result of Meiosis?____ A. Diploid cells are reduced by 1/2 B. Diploid cells double
Diploid cells are reduced by 1/2
An individuals complete set of chromosomes arranged in numerical order
What is a Karyotype?
Two chromosomes that are the same size, carry the same genes, and look the same under the microscope but have some minor base differences in their comparative DNA code.
What are a Homologous pair
same "recipe" but minor differences in their genes.
The main event in meiosis 1
the homologous pairs are lined up in pairs and are being pulled apart by spindle fibers
In mitosis, a body cell produces two identical body cells. How is meiosis different? 1. body cell is doubled 2. it starts with a body cell and produces 4 gametes
2. It starts with a body cell and produces 4 gametes
A _______ cell is the kind of cell meiosis begins with? 1. haploid 2. diploid
What is 2. diploid
An organism has 62 chromosomes. After completion of meiosis, how many chromosomes will the gametes contain?
62 / 2 = 31 chromosomes
This is the one step that is identical in every way between meiosis and mitosis (description of step)
What is the first step where the DNA replicates (duplicates itself)
It is being produced in meiosis? A. haploid gametes B. haploid somatic cells C. diploid gametes D. Diploid somatic cells
What is A. haploid gametes
One comes from your dad's gamete and one comes from your mom's gamete. They are...
What are homologous chromosomes
A doctor looks at the blood draw lab results and the basic intake data that the nurse took on a patient. He decides the patient has blood disorder and there will need to be more tests. Is his conclusion scientific or unscientific
scientific
He used physical evidence that related to his answer (blood draw results)
This does not mean his conclusion is correct. More data is needed.
During meiosis, homologous chromosomes exchange a little bit of genetic material. What do we call this exchange?
Crossing over
They are identical and they make up a super chromosome.
What are sister chromatids?
Two chromosomes that are the same size, carry the same exact genes, and look the same under the microscope and are attached at the centromere.
(FYI the dot in the middle of the chromosome is called a centromere)
What are sister chromatids (or a super chromosome)
They are identical to each other
sister chromotids seperate in this main event...
What is Meiosis 2
the second splitting of the daughter cells into 4 gametes
What does the CELL looks like in the step when crossing over happens. Describe how many cells there are, (is it meiosis 1 or meiosis 2) and how the chromosomes look.
Meiosis 1 (there is 1 cell)
the super chromosomes are lining up in pairs in the middle in a line down the middle of the cell.
A ______ has the total amount of chromosomes for the organism. 1. Haploid 2. Diploid
What is 2. Diploid?
Long pieces of DNA that contains coding and non-coding sections.
What are chromosomes
After this point in meiosis there are no homologous pairs. What was our name for that point....
What is the main event of meiosis 1
(aka anaphase 1)