What is a Chromosome? And other related questions.

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Presentation transcript:

What is a Chromosome? And other related questions

Chromosomes Threadlike structures or granular chromatin during interphase In nucleus Carry DNA Form for mitosis Displayed as a karyotype 

Gene Part of chromosome that controls the inherited traits One part of DNA Located on a certain place of the chromosome 1 gene = 1 trait May work together Also control chemical processes of life

Chromosome Pairs Occur in pairs One version from each parent One version of each gene from each 23 pair in humans Usually similar in size, shape, and genes (homologous)

All these have 23 pair! Does chromosome # determine species?

Privvy = Privet (privacy)

Alleles Different versions of same gene Usually found at same location on the same chromosome At least 2; sometimes several

Examples of Gene Alleles Eye color – blue or brown groups Then divided: Blue = blue, green, gray Brown = gold, brown, black Amount of melanin

Examples of Gene Alleles Flower color Two or many

Examples of Gene Alleles Seed coat Just two

Others

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