Mental retardation in man occurs due to:
1. Loss of one X chromosome
2. Addition of one X chromosome
3. Slight growth in Y
4. Overgrowth in Y

Subtopic:  Non - Disjunction & Aneuploidy |
 74%
From NCERT
AIPMT - 1998

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Consider the following statements:

I: People affected by phenylketonuria are unable to convert tyrosine to phenylalanine.
II: Alzheimer’s disease results from the accumulation of amyloid protein plaques in the brain.
III: Klinefelter’s and Turner’s syndromes are the result of nondisjunction of the sex chromosomes in either of the sexes.

Which of the above statements are true?

1. I and II only 2. I and III only
3. II and III only 4. I, II, and III
Subtopic:  Mendelian Disorders | Non - Disjunction & Aneuploidy |
 70%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Which of the following would not be a feature seen in a patient with the following karyotype?
   
1. Many loops on fingertips
2. Congenital heart disease
3. Big and wrinkled tongue
4. Mucus clogging of airways

Subtopic:  Non - Disjunction & Aneuploidy |
 69%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


advertisementadvertisement

Nondisjunction of a pair of homologous chromosomes occurs during the anaphase of meiosis I. The four gametes produced as a result of this nondisjunction event will be:

1. n + 1; n + 1; n - 1; n - 1 2. n + 1; n - 1; n; n
3. n + 1; n - 1; n - 1; n - 1 4. n + 1; n + 1; n; n
Subtopic:  Non - Disjunction & Aneuploidy |
 67%

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

Conditions of a karyotype 2n +1, 2n –1 and 2n + 2, 2n – 2 are called:

1.Aneuploidy2.Polyploidy
3.Allopolyploidy4.Monosomy

Subtopic:  Non - Disjunction & Aneuploidy |
 76%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.