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Punnett Squares and Sex-Linked Traits
This deck covers the basics of Punnett squares and sex-linked traits, including how to predict genetic outcomes and understand inheritance patterns.
What is a Punnett square?
A Punnett square is a diagram used to predict the genotype and phenotype combinations of a genetic cross.
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Key Terms
Term
Definition
What is a Punnett square?
A Punnett square is a diagram used to predict the genotype and phenotype combinations of a genetic cross.
What are sex-linked traits?
Sex-linked traits are traits that are associated with genes located on the sex chromosomes, typically the X chromosome.
How do Punnett squares help in genetics?
Punnett squares help visualize the possible genetic combinations from a cross and predict the probability of offspring inheriting particular traits.
Which chromosome is most commonly associated with sex-linked traits?
The X chromosome is most commonly associated with sex-linked traits.
What is a genotype?
A genotype is the genetic makeup of an organism, representing the combination of alleles inherited from the parents.
What is a phenotype?
A phenotype is the observable physical or physiological traits of an organism, determined by its genotype.
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| Term | Definition |
|---|---|
What is a Punnett square? | A Punnett square is a diagram used to predict the genotype and phenotype combinations of a genetic cross. |
What are sex-linked traits? | Sex-linked traits are traits that are associated with genes located on the sex chromosomes, typically the X chromosome. |
How do Punnett squares help in genetics? | Punnett squares help visualize the possible genetic combinations from a cross and predict the probability of offspring inheriting particular traits. |
Which chromosome is most commonly associated with sex-linked traits? | The X chromosome is most commonly associated with sex-linked traits. |
What is a genotype? | A genotype is the genetic makeup of an organism, representing the combination of alleles inherited from the parents. |
What is a phenotype? | A phenotype is the observable physical or physiological traits of an organism, determined by its genotype. |
Why are males more likely to express recessive sex-linked traits? | Males are more likely to express recessive sex-linked traits because they have only one X chromosome, so a single recessive allele on the X will result in the trait being expressed. |
What does it mean if a trait is 'dominant'? | A dominant trait is one that is expressed in the phenotype even if only one allele is present. |
What is a carrier in terms of sex-linked traits? | A carrier is an individual who has one copy of a recessive allele for a trait and does not express the trait but can pass the allele to offspring. |
How can Punnett squares be used to predict sex-linked trait inheritance? | Punnett squares can be used to map out the possible combinations of alleles from the parents, showing the probability of offspring inheriting sex-linked traits. |