Down’s syndrome is caused by an extra copy of chromosome number $21$. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder
Down’s syndrome is caused by an extra copy of chromosome number $21$. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder
- [AIPMT 2003]
- A
$25\%$
- B
$100\%$
- C
$75\%$
- D
$50\%$
Similar Questions
Give differences : Mendelian disorders and Chromosomal disorders
Give differences : Mendelian disorders and Chromosomal disorders
Choose correct answer.
$(i)$ Sickle - cell anaemia is controlled by three pairs of allele.
$(ii)$ Trisomy is chromosomal disorder.
$(iii)$ $47$ chromosome present in person whose having Turner's syndrome.
Choose correct answer.
$(i)$ Sickle - cell anaemia is controlled by three pairs of allele.
$(ii)$ Trisomy is chromosomal disorder.
$(iii)$ $47$ chromosome present in person whose having Turner's syndrome.
In man, which of the following genotypes and phenotypes may be the correct result of aneuploidy in sex chromosomes?
In man, which of the following genotypes and phenotypes may be the correct result of aneuploidy in sex chromosomes?
The number of chromosomes in Down's syndrome is
The number of chromosomes in Down's syndrome is
- [AIPMT 2005]
Describe chromosomal disorder and describe its examples
Describe chromosomal disorder and describe its examples