Animal Cell

A Replicated Chromosome

Diploid vs. Haploid

• Diploid= 2 sets of chromosomes– One set from mom and one set from dad– Chromosomes come in pairs– Humans have 23 pairs of chromosomes

• Haploid = 1 set of chromosomes– Sperm or egg has 23 single chromosomes

chromosomes (unduplicated) in parent cell at interphase

same chromosomes (duplicated) in interphase prior to mitosis

mitosis, cytoplasmic division

chromosome (unduplicated) in daughter cell at interphase

chromosome (unduplicated) in daughter cell at interphase

Metaphase chromosomes from a human female

The Cytoskeleton

Interphase

nuclear envelope

pair of centrioles

Early Prophase

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Late Prophase

Metaphase

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Anaphase Telophase Interphase

Cytokinesis

Mitosis is over, and the spindle is now

disassembling.

Band of microfilaments at the former spindle equator contracts.

The contractions continue and cut the cell in two.

A Duplicated Chromosome

one chromatid

its sisterchromatid

One chromosome in the duplicated state

centromere

In-text

Figure

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Homologous Pair

Meiosis Overview

Crossing Over

Meiosis

Alternation of Generation