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Questions and Answers
What is a sex-linked trait?
What is a sex-linked trait?
What is an X-linked trait?
What is an X-linked trait?
A trait where the gene or allele is found on the X chromosome.
What is color blindness?
What is color blindness?
An X-linked recessive trait associated with the inability to distinguish red from green.
What is hemophilia?
What is hemophilia?
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What is a Y-linked trait?
What is a Y-linked trait?
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What is hypertrichosis pinnae auris?
What is hypertrichosis pinnae auris?
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Females will have two copies of a sex-linked gene while males will only have one copy.
Females will have two copies of a sex-linked gene while males will only have one copy.
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How does the sex of offspring get determined?
How does the sex of offspring get determined?
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What is red-green colorblindness?
What is red-green colorblindness?
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What causes hemophilia?
What causes hemophilia?
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What is Duchenne Muscular Dystrophy?
What is Duchenne Muscular Dystrophy?
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What is male pattern baldness?
What is male pattern baldness?
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What factors influence the possibility of being color blind?
What factors influence the possibility of being color blind?
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Study Notes
Sex-Linked Traits Overview
- Sex-linked traits are genes located on the sex chromosomes, primarily on the X chromosome.
- Males have one X and one Y chromosome while females have two X chromosomes, affecting the expression of these traits.
X-Linked Traits
- Traits where the gene or allele is found on the X chromosome.
- Males exhibit these traits more frequently due to having only one X chromosome.
Color Blindness
- A recessive X-linked trait leading to the inability to distinguish red from green colors.
- More common in males as they have only one X chromosome.
Hemophilia
- A recessive X-linked disorder resulting in delayed blood clotting due to missing clotting factors.
- Hemophilia leads to excessive bleeding from minor injuries and is hereditary.
- Females must be homozygous recessive to express the trait, making it rarer among them.
Y-Linked Traits
- Traits linked to genes found on the Y chromosome, affecting male offspring exclusively.
Hypertrichosis Pinnae Auris
- A Y-linked condition characterized by hair growth in external ears in males.
Genetics and Gender Determination
- Male sperm can be either X or Y, determining the sex of the offspring; X sperm produces females, Y sperm produces males.
- Females can only produce X eggs.
Implications of Sex-Linked Traits
- Males have a higher chance of expressing recessive sex-linked traits, as they require only one copy.
- Females need two copies of the recessive gene to express the trait, hence they are often carriers.
Duchenne Muscular Dystrophy
- An X-linked condition causing muscular weakness and progressive muscle tissue deterioration.
Hemophilia Variants
- Hemophilia A (classical) is due to factor VIII deficiency.
- Hemophilia B (Christmas disease) is caused by factor IX deficiency, resulting in prolonged bleeding.
Male Pattern Baldness
- An X-linked recessive trait that increases the likelihood of baldness in males due to their single X chromosome.
- Females must have two recessive alleles to exhibit this trait.
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Description
Explore the concepts of sex-linked traits through this set of flashcards. Learn about how genes located on the sex chromosomes affect various characteristics, including examples such as hemophilia. This quiz is ideal for understanding genetics in the context of gender.
