BIOL 1020 Lecture Notes - Lecture 9: Meiosis, Sickle-Cell Disease, Common Wheat
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BIOL 1020 Full Course Notes
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The color of the leaves have started to change (this is because the chlorophyll is starting to break down and it is not rebuilt. Therefore the orange color of beta-carotene and the yellow color of xanthophyll (accessory pigments) which are usually masked by the green are suddenly unmasked. ) Female ginkgo"s produce a seed that when squashed causes the seed to smell really bad like rancid butter due to botanic acid. Dosage compensation is a. k. a the lion hypothesis (why female cells have bar bodies- dark spots in the nucleus). This bar body is one of the two x- chromosomes that is shut off during the blastula stage. As the embryo develops all cells will turn off the same x-chromosome that was turned off in the original cell. You have to have the same amount of gene product between the two sexes. Since males only have one x-chromosome females have to have the same dosage of x-chromosome material making females mosaic.
