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Sex-linked traits are traits that are found on the sex chromosomes (23rd pair), most commonly on the X chromosome (AKA: X-linked traits)
Sex-linked traits are traits that are found on the sex chromosomes (23rd pair), most commonly on the X chromosome (AKA: X-linked traits)
When working with sex-linked traits you have to use the X and Y chromosome with the alleles written as superscript.
When working with sex-linked traits you have to use the X and Y chromosome with the alleles written as superscript.
Sex-linked traits are typically recessive and are seen more in males as they only have to inherit one allele in order to express the trait.
Sex-linked traits are typically recessive and are seen more in males as they only have to inherit one allele in order to express the trait.
Colorblindness is a recessive, x-linked trait. This punnett square shows a colorblind female crossed with a normal-vision male.
Colorblindness is a recessive, x-linked trait. This punnett square shows a colorblind female crossed with a normal-vision male.
There is no allele on the Y chromosome in this punnett square because the trait is only found on the X chromosome.
There is no allele on the Y chromosome in this punnett square because the trait is only found on the X chromosome.
(XX= female, XY= male)
(XX= female, XY= male)
Example:
Example:
color blind female x normal vision male
color blind female x normal vision male
Can you see the numbers in these color blind tests?
Can you see the numbers in these color blind tests?
Concept Check...
Concept Check...
Hemophilia is a recessive, sex-linked disorder that prevents the blood from clotting properly resulting in excessive bleeding.
Create a punnett square to cross a heterozygous female with a unaffected male. What is the probability that they will have a child who has hemophilia? (answer is at the bottom of page)
Watch the video and add to your notes.
Watch the video and add to your notes.
Answer to your concept check...
Answer to your concept check...
Inheritance Quizlet
Inheritance Quizlet
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