biol1201 Chapter 15 chromosomal basis of traits

biol1201 Chapter 15 chromosomal basis of traits - CHAPTER...

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CHAPTER 15 – THE CHROMOSOMAL BASIS OF INHERITENCE 15.1 The CHROMOSOME THEORY of INHERITENCE is the idea that both  chromosomes and genes parallel each other during gamete formation Thomas Hunt Morgan was able to find notable differences when he  observed a species of fruit fly that he mated in his laboratory o The WILD TYPE species displayed traits that are normal for this  species, while the MUTANT PHENOTYPES displayed traits that  were uncommon o He concluded that somehow, this mutant trait was linked to the  male’s one Y chromosome, since only the F2 generation males  had the mutant trait 15.2 Each chromosome has hundreds or even thousands of genes which  tend to be inherited with each other, called LINKED GENES. o Going back to Morgan’s flies, when he crossed two species  (one being true-breeding wild types; the other being mutated), 
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biol1201 Chapter 15 chromosomal basis of traits - CHAPTER...

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