The structure in chromatin seen as beads-on string when viewed under electron microscope are called _______________.
Nucleosomes constitute the repeating unit of a structure in nucleus called chromatin, thread-like stained (cultured) bodies seen in nucleus. The nucleosomes in chromatin are seen as beads-on-string structure when viewed under electron microscope.
Pick out the correct statements. (a) Haemophilia is a sex-linked recessive disease. (b) Down's syndrome is due to aneuploidy. (c) Phenylketonuria is an autosomal recessive gene disorder. (d) Sickle cell anaemia is an X-linked recessive gene disorder.
The genotypes of a Husband and Wife are $$I^AI^B$$ and $$I^Ai$$. Among the blood types of their children, how many different genotypes and phenotypes are possible?
A disease caused by an autosomal primary non-disjunction is
Mention any two autosomal genetic disorders with their symptoms.
Gynaecomastia is a common feature seen in
Choose the correct answer from the alternatives given. Match column I with column II and select the correct option from the given codes. Column I Column II A. Normal woman (i) 14 B. Klinefelters syndrome (ii) 45 C. Turners syndrome (iii) 46 D. Pisum sativum (iv) 47
Choose the correct answer from the alternatives given. Match column I with column II and select the correct option from the given codes. Column I Column II A. Turners syndrome (i) Trisomy B. Linkage (ii) AA + XO C. V-chromosome (iii) Morgan D. Downs syndrome (iv) TDF
Choose the correct answer from the alternatives given. Match column I with column II and select the correct option from the given codes. Column I Column II A. Chromosomal aberration (i) An additional sex chromosome B. Downs syndrome (ii) Inversion C. Klinefelters syndrome (iii) Presence of an extra chromosome D. Turners syndrome (iv) Absence of sex chromosome
Which of the following is not an example of recessive autosomal disease?
Mongolism is a genetic disorder which is caused by the presence of an extra chromosome number