Zw sex determination

Not intercourse, though — more about how genetic sex is programmed during development. Sexual identity has been in the news often lately, and unsurprisingly so: the past few years have yielded sweeping reforms in civil rights, spurring new conflicts surrounding everything from age-old battles in gender equality to legislation enforcing anti-transgender bathrooms. Most multicellular organisms, humans included, use sexual reproduction to reproduce. Compared to asexual reproduction, in which cells can simply create carbon copies of themselves, sexual reproduction allows for the introduction of genetic diversity into a population. In most sexually reproducing organisms, there are two sexes — but the ways in which these sexes are determined and the ways in which they manifest vary greatly.
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17.05.2020
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“I’m XY and I Know It”: Sex Determination Systems 101

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ZW sex-determination system - Wikipedia

Your sex characteristics were determined by X and Y chromosomes, same as most other creatures from humans to fruit flies. So why do birds and butterflies have ZW chromosomes instead? And more importantly, why does ZW produce a female bird while ZZ produces a male? Birds, butterflies, and snakes take everything we know about sex at the chromosomal level and stand it on its head. Instead of X and Y chromosomes, they have Z and W chromosomes. What's the difference?
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Sex-determination system

Log in or sign up to add this lesson to a Custom Course. Log in or Sign up. You may have already heard about how your body determined your sex - if you're a woman, you have XX chromosomes, and if you're a man, you have XY, right?
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A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. Most organisms that create their offspring using sexual reproduction have two sexes. Occasionally, there are hermaphrodites in place of one or both sexes.
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