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-long thread of DNA that consists of genes.
-cells have autosomes = sex chromosomes.
-Body cells have 23 pairs of chromosmes |
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| A process by which a cell divides its nucleus and contents. |
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| A cell process that reduces chromosome # by half |
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| Gametes are not diploid but they are haploid which means a cell has 1 copy of each chromosome (x,y) |
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Definition
-body cells are diploid
-cell has 2 copies of each chromosome
-each chromosome has 1 from mother and 1 from father |
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Definition
-sex cells
-DNA in gamete cells can be passed on to childen |
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| Body cells make up most of body tissue = organ DNA in these cells are not passed on to children |
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Definition
-fusion of an egg = sperm
-2 nucleus fuse to form 1 |
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| region of condensed chromosomes that look pinched...where spindle fibers attach during meiosis and mitosis |
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| a process by which the cell cytoplasm divides. |
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Definition
| chromosome that have the same length, appearance and copies of genes. Alleles may differ. |
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Definition
| the production of gametes. It includes both meiosis and other changes that produce a mature cell. |
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Definition
-Occurs during meiosis and helps create even greater variation.
-it is the exchange of chromosome segments between homologous chromosomes during prophase 1 of meiosis 1.
-it happens anytime a germ cell divides |
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Definition
| a loose combination of DNA and proteins that is present during interphase. |
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Definition
| 1/2 of a duplication chromosome. |
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| a cell that form when male gamete fertilizes a female gamete. |
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Definition
-a picture of all of the chromosomes in a cell..
-chemicals are used to stain them to easily see the different chromosomes. |
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