Q. No.If Ram has a brother Shyam suffering from Cystic Fibrosis, what is the probability of Ram being a carrier as his parents are normal?
a.1/4
b. ½
c.2/3
d.3/4
Which of the four couples claiming the baby O positive blood type are possible biological parents of it?
a. B- and O-
b. O+ and AB+
c. AB+ and AB-
d.A+ and O-
If two people who are carrier for a genetically inherited fatal recessive disease decide to marry and disease cause still birth. What is the probability of the live children to be a carrier?
a.1/2
b.2/3
c.1/4
d.1/3
Assertion : Phenylketonuria is a recessive hereditary disease caused by the body’s failure to oxidize an amino acid phenylalanine to tyrosine, because of a defective enzyme.
Reason : It results in the presence of phenylalanine acid in the urine.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Assertion : In honey bee, life history shows natural and complete parthenogenesis.
Reason : In honey bee, both drones and workers are parthenogenetically developed.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
A plant, on repeated self pollination, preserves the trait expressed for many generations. Such a plant is said to be:
(1) Panmictic
(2) Homologous
(3) Apomictic
(4) Pure line
The F1 progeny in monohybrid crosses by Mendel resembled:
1. The parent exhibiting dominant trait completely
2. The parent exhibiting recessive trait completely
3. The parent exhibiting dominant trait partly
4. The parent exhibiting recessive trait partly
A test cross is done to find out:
(1) Fitness of an organism
(2) Genotype of a plant expressing dominant phenotype
(3) The suitable parents for a Mendelian Cross
(4) The hidden genotypic ratio of F2 phenotypes
What is the ratio of a typical monohybrid test cross?
(1) 2 : 1
(2) 3 : 1
(3) 1: 2 : 1
(4) 1 : 1
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