Chromosomal theory

Chromosomal theory - The chromosomal theory Autosomes and...

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The chromosomal theory Autosomes and sex chromosomes Linkage and mapping
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- Genes are DNA. - The DNA molecules are complexed with proteins and coiled and folded…
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…into a structure known as a chromosome
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Chromosomal theory of inheritance - developed in 1902 by Walter Sutton - proposed that genes are present on chromosomes - based on observations that homologous chromosomes pair with each other during meiosis - supporting evidence was provided by Morgan’s work with fruit flies
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All human chromosomes have 2 arms (short arm = p and long = q). The position of the centromere defines whether the chromosome is metacentric (two substantial arms) or acrocentric . At each end of the chromosome is a telomere , a structure designed to avoid problems with linear DNA replication.
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The acrocentric chromosomes are # 13, 14, 15, 21 and 22. The sum of all the chromosome information is known as a karyotype.
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female X (mutant) white-eyed male gave a F1 all red-eyed red eyes are dominant? Morgan’s fruit flies
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Chromosomal theory - The chromosomal theory Autosomes and...

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