In some scenarios, healthy parents give birth to a child that possesses an autosomal dominant disorder....
In some scenarios, healthy parents give birth to a child that possesses an autosomal dominant disorder. What is a possible explanation for this? Explain your answer.
What is the difference between nondisjunction in meiosis I and meiosis II?
Homework Answers
When parents give birth to a child with autosomal dominant disorder then in this case this happens because both the parents are carriers.
When both the parents are carriers then in this case then when both faulty genes are inherited in the individual then in this case the child suffers from the disorder.
As there are two pairs of chromosomes in an individual so if both the inherited copies are faulty then the individual suffers from the disease.
Non disjunction can occur in either meiosis I or meiosis II. If homologous chromosomes fail to separate in meiosis I then the result is two gametes with no chromosome and two gametes two copies of chromosome.
If they fail to separate in meiosis II then the result is one gamete without chromosome and two normal gamete with one copy of chromosome, and one gamete with two copies of the chromosome.
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