1 - GENETICS - Mitosis Lesson.pdf

1 - GENETICS - Mitosis Lesson.pdf - Genetics Types of Cell...

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1 ­ GENETICS­ Mitosis Lesson 1 Genetics Types of Cell Reproduction Asexual Reproduction involves a single cell dividing to make two new, identical daughter cells > based on the process of MITOSIS > examples include: budding; spore formation; binary fission Sexual Reproduction involves two cells (egg & sperm) joining together to make a new cell (zygote) that is NOT genetically identical to the original cells > based on the process of MEIOSIS Chromosomal Organization The hereditary/genetic material in the nucleus of cells is made up of long strand of DNA that are condensed, folded, and in association with proteins, formed into CHROMOSOMES . Prior to undergoing duplication chromosomes are found in the unduplicated form in which they appear as a single strand. Each chromosome must be duplicated prior to the start of mitosis. The original chromosomes and its duplicate are attached to each other by a structure called a centromere . In the duplicated form, a single chromosome appears as two strands and a centromere. These two strands are referred to as sister chromatids .
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1 ­ GENETICS­ Mitosis Lesson 2 Cells need to divide because … Cells die and need to be replaced Cells reach a maximum size. (In order to grow any larger, an organism needs to create more cells.) Organisms need to create offspring to continue the population of a species.
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  • Winter '17
  • James Mintz

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