X-inactivation (article) | Khan Academy
Course: Biology archive > Unit 14. Lesson 4: Sex linkage, chromosomal mutations, & non-nuclear inheritance. X-linked inheritance. Sex-linked traits. X-inactivation.
X-inactivation (article) | Sex linkage | Khan Academy
Course: High school biology (DEPRECATED) > Unit 5. Lesson 3: Sex linkage. Worked example: Punnett square for sex-linked recessive trait. X-linked inheritance. X-inactivation.
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Learn about sex linkage, sex determination, and X-inactivation in non-Mendelian genetics.
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Course: How evolution works? - Class 12 > Unit 4. Lesson 6: Sex determination, linkage, and chromosomal disorders. Sex determination. Sex Determination in humans. Sex Determination in Birds. Sex Determination in Honey Bees. X-linked inheritance. Worked example: Punnett square for sex-linked recessive trait.
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Course: Arithmetic (all content) > Unit 4. Lesson 8: Multiplying & dividing negative numbers. Multiplying positive & negative numbers. Multiplying numbers with different signs. Why a negative times a negative makes sense. Signs of expressions. Dividing positive and negative numbers.
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Why dividing by zero is undefined (video) | Khan Academy
As much as we would like to have an answer for "what's 1 divided by 0?" it's sadly impossible to have an answer. The reason, in short, is that whatever we may answer, we will then have to agree that that answer times 0 equals to 1, and that cannot be true, because anything times 0 is 0.
Dividing polynomials by x (no remainders) - Khan Academy
Discover how to divide polynomials by 'x' in two different ways. Finding the quotient (x⁴-2x³+5x)/x is the same as asking "what should we multiply by x to get x⁴-2x³+5x?" First, we distribute '1/x' to each term in the polynomial. Second, we factor out an 'x' from each term. Both methods simplify complex expressions,
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Function values can be positive or negative, and they can increase or decrease as the input increases. Here we introduce these basic properties of functions.
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