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What is codominance in genetics?

Back

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

Front

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

Back

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

Front

What is sickle-cell disease?

Back

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?

Back

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

Front

How does nondisjunction relate to genetic disorders?

Back

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

Front

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

Back

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

Front

What is the role of alleles in genetic inheritance?

Back

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?

Back

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?

Back

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?

Back

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