Q. No.In Phenylketonuria,
I:
Phenylpyruvic acid and other derivatives are accumulated in brain resulting in mental retardation.
II:
These are also excreted through urine because of its poor absorption by kidney.
1. Only I is correct
2. Only II is correct
3. Both are correct
4. Both are incorrect
1. Only I is correct
2. Only II is correct
3. Both are correct
4. Both are incorrect
When there is a change in chromosome number such that the changes number is not an exact multiple of base number [haploid number], the condition is called as:
(1) Euploidy
(2) Aneuploidy
(3) Aberration
(4) Non-disjunction
An individual affected by Klinefelter’syndrome:
(1) Has 47 autosomes
(2) Has overall feminine development
(3) Has gynecomastia
(4) Has an additional copy of Y chromosome.
Which of the following is developed by parthenogenesis:
A.Drones
B.Queen Honey bee
C.Worker honey bee
D.Both B and C
In sickle cell anaemia, the mutant haemoglobin molecule undergoes
(1) Polymerisation under low oxygen tension causing that changes the shape of the RBC to sickle like structure
(2) Depolymerisation under low oxygen tension causing that changes the shape of the RBC to sickle like structure
(3) Denaturation under high oxygen tension causing that changes the shape of the RBC to sickle like structure
(4) Denaturation
The point mutation in sickle cell anaemia leads to a change in codon. Identify the correct change:
(1) UGA to UAA
(2) GUG to GAG
(3) GAG to GUG
(4) UAA to UGA
Thalesemia is inherited as a/an ____________ condition.
(1) Autosomal recessive
(2) Autosomal dominant
(3) Sex linked recessive
(4) Sexlinked dominant
A couple has a daughter. What is the probability that their next child will be a daughter?
(1) 0 %
(2) 25 %
(3) 50 %
(4) 100 %
In humans, the mechanism of sex determination is:
(1) XX – XY; male heterogamety
(2) XX – XY; female heterogamety
(3) XX – XO; male heterogamety
(4) XX – XO; female heterogamety
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