Podcast
Questions and Answers
What is the term used to describe a chromosome where the centromere is near one end of the chromosome?
What is the term used to describe a chromosome where the centromere is near one end of the chromosome?
Which region of the Y chromosome allows for recombination with the X chromosome?
Which region of the Y chromosome allows for recombination with the X chromosome?
In genetic mosaics, what happens to one of the X chromosomes in females?
In genetic mosaics, what happens to one of the X chromosomes in females?
What is the term for an unbalanced set of chromosomes, where the relative gene dosage is upset?
What is the term for an unbalanced set of chromosomes, where the relative gene dosage is upset?
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Which genetic rearrangement involves reversing the order of genes in a chromosome segment?
Which genetic rearrangement involves reversing the order of genes in a chromosome segment?
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What is the term for a species that has multiple complete sets of chromosomes?
What is the term for a species that has multiple complete sets of chromosomes?
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'Double-Y' syndrome refers to which chromosomal abnormality?
'Double-Y' syndrome refers to which chromosomal abnormality?
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Which genetic event results in 'Down Syndrome'?
Which genetic event results in 'Down Syndrome'?
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'Turner Syndrome' is characterized by having how many total chromosomes?
'Turner Syndrome' is characterized by having how many total chromosomes?
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Study Notes
Chromosomal Terminology
- A chromosome with a centromere near one end is called an acrocenic chromosome.
Sex Chromosomes
- The region of the Y chromosome that allows for recombination with the X chromosome is called the pseudoautosomal region.
Genetic Mosaics
- In females, one of the X chromosomes is inactivated in genetic mosaics.
Chromosomal Abnormalities
- An aneuploid is an unbalanced set of chromosomes, where the relative gene dosage is upset.
Genetic Rearrangements
- Inversion involves reversing the order of genes in a chromosome segment.
Polyploidy
- A species that has multiple complete sets of chromosomes is called a polyploid.
Chromosomal Abnormalities
- Double-Y syndrome refers to a chromosomal abnormality where an individual has two Y chromosomes (XYY).
- Down Syndrome results from a genetic event called trisomy 21, where an individual has an extra copy of chromosome 21.
- Turner Syndrome is characterized by having 45 total chromosomes, where one of the sex chromosomes is missing or partially deleted.
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Description
Learn about karyotypes, metacentric, submetacentric, acrocentric chromosomes, and how chromosome bands are classified. Explore the different parts of a chromosome and their significance.
