1 / 8

Meiosis Vocabulary

Meiosis Vocabulary. Chromatin. Chromosomes. All of the DNA in an uncondensed (spaghetti-like) form. A double rod of condensed chromatin. Sister Chromatids : the two halves of a chromosome; half original, half rebuilt

rufina
Download Presentation

Meiosis Vocabulary

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Meiosis Vocabulary

  2. Chromatin Chromosomes • All of the DNA in an uncondensed (spaghetti-like) form • A double rod of condensed chromatin

  3. Sister Chromatids: the two halves of a chromosome; half original, half rebuilt • Homologous Chromosomes (pairs): chromosomes containing the same gene (possibly different alleles) • one from mom, one from dad • Line up together in tetrads during meiosis

  4. Centromeres: the region of DNA where 2 sister chromatids come together • Spindle Fibers: fibers that attach to sister chromatids and bring them to opposite poles during meiosis

  5. Types of Cells Diploid Haploid • Cells that contain double the amount of chromosomes than haploid cells • Usually called the “normal” number of chromosomes • Two copies of each gene • Cells that contain half the amount of chromosomes than diploid cells • One copy of each gene

  6. Tetrads • How the chromosomes line up during Metaphase I of meiosis • Homologous chromosomes and their copies (sister chromatids) line up

  7. Segregation • Homologous chromosomes randomly line up in tetrad formation during meiosis • Many possibilities for the combination of alleles in offspring Two possibilities of lining up

  8. Crossing-Over • Exchange of genes between homologous chromosomes during meiosis • Adds more variation

More Related