Autosomal Dominant and Recessive Disorders

The video tutorial covers genetic inheritance patterns, focusing on autosomal dominance and recessive disorders. It explains autosomes, their role in genetic disorders, and provides examples of both autosomal recessive and dominant disorders. The tutorial also includes practice problems to help understand genetic calculations using Punnett squares.

What is the genotype of a person with an autosomal dominant disorder if they are heterozygous?

• Capital D, Capital H

• Capital D, Lowercase d

• Capital D, Capital D

• Lowercase d, Lowercase d

Which chromosomes are considered autosomes?

• Chromosomes 1 through 10

• Only Chromosome 1

• Chromosome 23

• Chromosomes 1 through 22

In autosomal recessive disorders, what is required for an individual to be affected?

• One dominant allele from each parent

• One recessive allele from each parent

• One dominant and one recessive allele

• Two dominant alleles

Which of the following is an example of an autosomal recessive disorder?

• Neurofibromatosis

• Familial hypercholesterolemia

• Huntington's disease

• Cystic fibrosis

What is the key difference between autosomal dominant and autosomal recessive disorders?

• Dominant disorders require only one copy of the allele

• Recessive disorders are always more severe

• Dominant disorders require two copies of the allele

• Recessive disorders require only one copy of the allele

Which disorder is caused by a gene on chromosome 4 and is autosomal dominant?

• Cystic fibrosis

• Huntington's disease

• Albinism

• PKU

What is the probability of a child being healthy if both parents are heterozygous for an autosomal dominant disorder?

• 0%

• 75%

• 50%

• 25%

In the practice problem involving Paul and Stacy, what is the genotype of their healthy child?

• Lowercase h, Lowercase h

• Capital H, Lowercase h

• Capital H, Capital H

• Capital H, Capital D

What is the likelihood of a child inheriting a severe form of Huntington's disease if both parents are heterozygous?

• 25%

• 50%

• 75%

• 100%

Which of the following is NOT an example of an autosomal dominant disorder?

• Neurofibromatosis

• Huntington's disease

• Albinism

• Familial hypercholesterolemia