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    Biology Unit 1 Gene mutations in cats

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    jeanlouis
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    Messages : 340
    Date d'inscription : 20/10/2007

    Biology Unit 1 Gene mutations in cats Empty Biology Unit 1 Gene mutations in cats

    Message  jeanlouis Sam 6 Sep - 19:39

    Biology Unit 1 Gene mutations in cats
    CHOOSE THE BEST WORD OR EXPRESSION TO MATCH THE DICTIONARY DEFINITIONS GIVEN BELOW
    Inky To Range The Agouti Protein Melanocyte To Flip Latch MC1R

    The _________ _____________regulates pigmentation in the mouse hair follicle producing a black hair with a subapical yellow band. A highly homologous ___________ ________signal protein (ASIP)is present in humans and is expressed at highest levels in adipose tissue where it may play a role in energy homeostasis and possibly human pigmentation

    ____________ means black or very dark blue. Example :The moon was rising in the ______ sky.

    ________________ is pigment-producing cell in the skin, hair and eye that determines their color. The pigment that ____________ s make is called melanin. The major determinant of color is not the number but rather the activity . Melanin production takes place in unique organelles (tiny structures within the cell) known as melanosomes. Darkly pigmented skin, hair and eyes have melanosomes that contain more melananin.

    If things ___________ between two points or from one point to another, they vary within these points on a scale of measurement or quality. Example : They ________ in price from $3 to $15. If a piece of writing or speech ____________s over a group of topics, it includes all those topics. Example :The conversation _______ed over the desirability of such restaurants, the shortcomings of men, and why it had only taken 15 minutes to cross a continent.

    A ____________is a fastening on a door or gate. It consists of a metal bar which you lift in order to open the door. Example :You left the _________ off the gate and the dog escaped.
    If you ____________a door or gate, you fasten it by means of a latch. Example : He _____________ed the door, tested it, and turned around to speak to Frank.

    Forms of melanin: There are two major forms of melanin -- eumelanin and pheomelanin. Eumelanin is brown to black while pheomelanin is yellow to red. The regulation of the production of eumelanin versus pheomelanin involves the interaction of the melanocortin 1 receptor (___________) on the surface of the melanocyte with melanocyte stimulating hormone (MSH) or with the agouti signaling protein. The binding of MSH to __________ results in the formation of eumelanin while the binding of the agouti protein to_________leads to the production of pheomelanin. Tanning of the skin due to UV exposure represents an increase in the content of eumelanin within the epidermis and its major purpose is increased photoprotection.


    If you ____________a device on or off, or if you _____________ a switch, you turn it on or off by pressing the switch quickly. Example : He didn't ___________ on the headlights

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