#Question id: 4782
#Unit 8. Inheritance Biology
True breeding agouti mice with genotype AABB were cross to true breeding albino mice with genotype aabb. All F1 offspring having agouti phenotype were allowed to intercross to produce F2 progeny as following number –
A- B - 180 agouti,
aa B- 60 black
-- bb 80 albino
A Male Mice with Aabb genotype was cross with female mice with AaBB genotype. What is probability of Black phenotype among their offspring?
#Question id: 7240
#Unit 5. Developmental Biology
Given below are the list of some organism (column A) and determination of their dorsal-ventral axis (column B)
|
S.No. |
Organism (Column A) |
S.No |
Determination of
dorsal ventral axis (Column B) |
|
A. |
Chick |
i. |
sperm entry
point and cortical rotation lead to specification
of dorsal side opposite the point of sperm entry |
|
B. |
Zebrafish |
ii. |
initial
symmetry-breaking event unknown. Localization of
maternal Ndr1 and nuclear b -catenin
species dorsal side and position of organizer |
|
C. |
Xenopus |
iii. |
interaction
between inner cell mass and trophectoderm |
|
D |
Mouse |
iv. |
posterior
marginal zone specifies ventral end of dorso-ventral axis |
#Question id: 20977
#Unit 12. Applied Biology
#Question id: 28762
#Unit 2. Cellular Organization
For optimal activity, of lysosomal acid hydrolases they need to be___
a)Activation based on sensitivity to cleavage by endoglycosidase-D
b)Activation by proteolytic cleavage
c)Requires an acid environment
#Question id: 4899
#Unit 8. Inheritance Biology
In Neurospora a cross between the genotypes 'A' and 'a' results in an ascus with ascospores of genotypes as shown below:
|
Ascus Class |
Ascospore |
||||||||
|
I |
A |
A |
A |
A |
a |
a |
a |
a |
|
|
II |
A |
A |
a |
a |
a |
a |
A |
A |
|
Statements A to D are events that could have occurred during meiosis.
A) Class I is results of no crossing over between the centromere and gene.
B) Class II is results of single crossing over between the centromere and gene
C) Class I shows segregation of alleles 'A' and 'a' in meiosis II
D) Class II shows segregation of alleles 'A' and 'a' in meiosis II