Jeans or Genes
Genes and DNA are located in what part of the cell?
Nucleus
DNA strand is twisted into a double _____.
Helix
How many stages are there in Meiosis?
8
How many stages are there in Mitosis?
4
Stage of Mitosis where the chromosomes line up in the middle of the cell
Metaphase
When the DNA splits in half, what cell part helps match the nitrogen bases to complete the other half.
Messenger RNA
Which nitrogen base always is across from Adenine?
Thymine
If a cell begins with 40 chromosomes, how many chromosomes are in the cells at the end of meiosis?
20 chromosomes
Which stage is missing? Interphase, Prophase, _____, Anaphase, Teleophase.
Metaphase
Stage of Mitosis where the chromosomes are pulled apart by the spindle fibers?
Anaphase
The messenger RNA matches the nitrogen bases in groups of ___ at a time.
3 at a time.
Which nitrogen base is always across from Cytosine?
Guanine
Stage where the chromosomes are not replicated or duplicated?
Interphase II
Stage where the chromosomes double, centromeres go from one to two, and nucleus membrane disappears.
Interphase
Name the four phases in order after Interphase?
Prophase, Metaphase, Anaphase, Teleophase
Which two nitrogen bases have only 2 hydrogen bonds holding them together?
Adenine & Thymine
What kinds of bonds hold Adenine and Thymine together on the DNA ladder?
Hydrogen bonds
What two cells in the human body use meiosis to make new cells?
Sperm and egg
Stage where the membrane begins to cleave into two, one centromere disappears, and the spindle fibers go away?
Teleophase
Between the phosphates on the sides of DNA is what large molecule?
Deoxiribose sugar molecule
Which two nitrogen bases have 3 hydrogen bonds between them?
Cytosine & Guanine
What element makes up the sides of the DNA molecule?
Phosphate
At the end of Meiosis, how many cells are made?
4
Stage where the spindle fibers attach to the centromeres and are ready to attach to the chromosome?
Prophase
Of Adenine, Thymine, Guanine, Cytosine- which two have an extra molecule attached to them?
Adenine & Guanine