Assignment 1: Chromosomal Basis of Inheritance

Front

What is a chromosomal disorder?

Back

A chromosomal disorder is a condition caused by an abnormal number of chromosomes or changes in the structure of chromosomes, leading to various health issues.

Front

Which syndrome is characterized by the presence of an extra chromosome 21?

Back

Down's syndrome.

Front

What is Tuner's syndrome?

Back

Tuner's syndrome is a chromosomal disorder affecting females, characterized by the absence of one X chromosome, leading to various developmental issues.

Front

What is Klinefelter's syndrome?

Back

Klinefelter's syndrome is a chromosomal disorder in males caused by the presence of an extra X chromosome, leading to physical and reproductive abnormalities.

Front

What is Huntington's disease?

Back

Huntington's disease is a genetic disorder caused by a mutation in a single gene, not a chromosomal disorder, leading to progressive brain degeneration.

Front

Define heredity.

Back

Heredity is the passing of physical characteristics or traits from parents to offspring.

Front

What is the role of dominant alleles in inheritance?

Back

Dominant alleles are variants of a gene that express their traits even when only one copy is present in an individual.

Front

What is an autosomal recessive disorder?

Back

An autosomal recessive disorder is a condition that occurs when an individual inherits two copies of a recessive allele, one from each parent.

Front

Give an example of an autosomal recessive disorder.

Back

Sickle cell anemia.

Front

How many chromosomes do human cells contain?

Back

46.