TLS Online TPP Program

#Question id: 3607


Cystic fibrosis is caused by a recessive lethal gene and can be detected by an excess concentration of chloride in sweat. If a sweat test reveals a man to be heterozygous and his wife to be homozygous normal, what are the chances that their children will have the disease?

#Unit 8. Inheritance Biology
  1. 1/2 of the children will have cystic fibrosis.

  2. None of their children will have cystic fibrosis.

  3. All of the children will have cystic fibrosis.

  4. All of their children will have Carrier