Cell+division - Lab PDF

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Broward College Prof. Harkas

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Cell Division

What are the functions of cell division? Cellular division has three main functions: 1. Aids in the reproduction of an entire unicellular organism 2. Helps in the growth and repair of tissues in multicellular animals 3. Aids in the formation of gametes (eggs and sperm) for sexual reproduction in multicellular animals.

Which of the following is involved in asexual and sexual reproduction. A. Requires egg and sperm? sexual reproduction. B. Involves meiosis? sexual reproduction. C. Requires one parent? asexual reproduction. D. Produces genetically identical offspring? asexual reproduction. E. Produces genetically different offspring? sexual reproduction. Inside the nucleus of a cell you will find DNA associated with proteins. This combination of Protein and DNA is known as _____________. Chromatin

Complete the following table comparing interphase with mitotic phase. Interphase Mitotic phase Interphase Chromosomes are condensed Cell is performing normal functions

interphase

Chromosome duplication occurs

interphase

Cell is actively dividing

Mitotic Mitotic phase

mitotic phase

Broward College Prof. Harkas

Sister chromatids are evenly aw distributed into two daughter cells

mitotic phase

Compare benign and malignant tumors Benign: If the abnormal cells remain at the original site (non-cancerous) Malignant: Can spread to neighboring tissues and other parts of the body, forming new tumors, can interrupt organ function (cancerous) ______________ will contain the same genes at the same locations. a. Sex chromosomes b. Autosomes c. Gametes d. Homologous chromosomes

Determine whether each of the following cells is haploid or diploid. e. An egg: Haploid f. A cell from your liver: Diploid g. A zygote: Diploid h. A sperm: Haploid i. A muscle cell from your heart: diploid Complete the following table that compares mitosis with meiosis. Mitosis Meiosis mitosis meiosis Rounds of DNA replication Mitosis 1 Meiosis 1 Rounds of cell division

Mitosis 1 in pro-meta-anatela Mitosis 1

Meiosis 1

Separation of homologous chromosomes

Mitosis N/A

Meiosis 1

Result (number of cells and haploid or diploid)

Mitosis has 2 diploid and has 46 chromosomes

Meiosis has 4 haploid and has 23 chromosomes

Separation of sister chromatids

Meiosis 2 meiosis I II

Broward College Prof. Harkas

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