Two Normal Individuals Have a Child Who Has Cystic Fibrosis,an

question 111

Multiple Choice

Two normal individuals have a child who has cystic fibrosis,an autosomal recessive disease.How did this happen?

• A) The mother had two recessive alleles.
• B) The mother had one recessive allele and one normal allele,and the father had two normal alleles.
• C) The mother had two normal alleles,and the father had one recessive and one normal allele.
• D) Each parent had one normal and one recessive allele.
• E) Both parents had two normal alleles.

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Definitions:

Years

Units of time equal to 365 or 366 days, used in the Gregorian calendar to measure the duration of a long period.

Mammography

An X-ray examination of the breast, used to detect and diagnose breast diseases like cancer.

Compressed

The state of being pressed into less space or condensed, often used in the context of data or materials.

Radiation

The emission and diffusion of rays; a product of X-ray and radium.