M2A1 Worksheet: Mitosis and Meiosis
A dog is a diploid organisms and has 39 pairs of chromosomes (2n = 78), where n = 39 chromosomes from each parent. Use this example to answer the following question regarding chromosomal number.
INTERPHASE
How many chromosomes are present in the somatic cell?
What do they look like?
What are they “doing” in G1 of this phase?
What is happening in the S phase?
What is happening in the G2 phase?
What follows G2 phase in a somatic cell?
What follows G2 phase in a gamete cell?
MITOSIS
Number of chromosomes in the parent cell.
Number of chromatids in the parent cell.
Number of chromosomes in the daughter cell.
Number of chromatids in the daughter cell.
How many daughter cells are produced?
Are the daughter cells haploid or diploid?
How many cell divisions take place?
In what type of cell does this division occur?
Meiosis 1:
Number of chromosomes in the parent cell.
Number of chromatids in the parent cell.
Number of chromosomes in each Meiosis I daughter cell.
Number of chromatids in each Meiosis I daughter cell.
Are the daughter cells haploid or diploid at the end of Meiosis 1?
Meiosis II:
Number of chromosomes in the “parent” cell (which is a daughter cell from Meiosis I).
Number of chromatids in the “parent” cell.
Number of chromosomes in each Meiosis II daughter cell.
Number of chromatids in each Meiosis II daughter cell.
Are the daughter cells haploid or diploid at the end of Meiosis II?
Which phase or phases of Meiosis account for the genetic variability among the daughter cells? How… what happens in this phase to create the diversity?
Comparing Mitosis and Meiosis…..
How many daughter cells result from Mitosis? Are they diploid or haploid?
How many daughter cells result from Meiosis? Are they diploid or Haploid?
Cell structures and function: Match each organelle to its function:
Organelle Function
Lysosome 1. Lipid synthesis
Rough ER 2. Houses DNA
Nucleus 3. Energy extraction
Smooth ER 4. Dismantles debris
Golgi apparatus 5. detoxification
Mitochondria 6. Protein synthesis
Peroxisome 7. Processes secretions
What is the function of checkpoint proteins in the cell cycle?
How can all of a person’s cells contain exactly the same genetic material, yet specialize as bone cells, nerve cells, muscle cells and connective tissues?
What are the 3 primary germ layers?
Briefly, in one or two sentences, distinguish between
a bacterial cell and a eukaryotic cell
interphase and mitosis
mitosis and apoptosis
an autosome and a sex chromosome
homologous pair of chromosomes and a sister chromatid
centromere and centriole
chromosome and chromatid
monozygotic and dizygotic twins
allele and gene
