Genetic Disorders

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What is codominance in genetics?

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Codominance is a genetic scenario in which both alleles in a heterozygous individual contribute equally and visibly to the organism's phenotype.

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What is the probability of inheriting Huntington's disease if one parent is affected?

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There is a 50% chance of inheriting Huntington's disease if one parent has the condition.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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What is sickle-cell disease?

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Sickle-cell disease is a genetic disorder that causes the production of abnormal hemoglobin, leading to distorted (sickle-shaped) red blood cells.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What is nondisjunction?

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Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate properly during cell division, leading to an abnormal number of chromosomes.

Tags

NGSS.HS-LS1-4

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How does nondisjunction relate to genetic disorders?

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Nondisjunction can result in aneuploidy, which alters the number of chromosomes and can lead to serious genetic disorders.

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What part of the body is affected by Huntington's disease?

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Huntington's disease primarily affects nerve cells in the brain.

Front

What is the role of alleles in genetic inheritance?

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Alleles are different versions of a gene that determine specific traits and can be dominant, recessive, or codominant.

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-3

Front

What is the difference between dominant and recessive alleles?

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A dominant allele expresses its trait even in the presence of a recessive allele, while a recessive allele only expresses its trait when two copies are present.

Front

What is aneuploidy?

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Aneuploidy is a condition in which there is an abnormal number of chromosomes in a cell, which can lead to genetic disorders.

Front

What are the symptoms of sickle-cell disease?

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Symptoms of sickle-cell disease include pain episodes, anemia, swelling in hands and feet, and increased risk of infections.