A human male produces sperms with the genotypes AB, Ab, aB and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person ?

(1) AaBb

(2) AaBB

(3) AABb

(4) AABB

Subtopic:  Dihybrid Cross Analysis |
 85%
NEET - 2007
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are:

1. n = 7 and x = 21

2. n = 21 and x = 21

3. n = 21 and x = 14

4. n = 21 and x = 7

Subtopic:  Non - Disjunction & Aneuploidy |
NEET - 2007
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Inheritance of skin colour in humans is an example of :

(1) chromosomal aberration

(2) point mutation

(3) polygenic inheritance 

(4) codominance

Subtopic:  Polygenic Inheritance & Pleiotropy |
 89%
From NCERT
NEET - 2007
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridised, then F2 segregation will show :

(1) higher number of the recombinant types

(2) segregation in the expected 9 : 3 : 3 : 1 ratio

(3) segregation in 3 : 1

(4) higher number of the parental types

Subtopic:  Dihybrid Cross: Details |
 58%
From NCERT
NEET - 2007
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

A common test to find the genotype or hybrid is by :

(1) crossing of one F2 progeny with male parent

(2) crossing of one F2 progeny with female parent

(3) studying the sexual behaviour of F1 progenies

(4) crossing of one F1 progeny with recessive parent

Subtopic:  Monohybrid Cross: Further Understanding |
 87%
From NCERT
NEET - 2007
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

In pea plants, yellow seeds are dominant to green. If heterozygous yellow seeded plant is crossed with a green seeded plant, what ratio of yellow and green plants would you expect in F1 generation ?

(1) 50 : 50

(2) 9 : 1

(3) 1 : 3

(4) 3 : 1

Subtopic:  Monohybrid Cross: 1 |
 72%
From NCERT
NEET - 2007
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Which one of the following is the most suitable, medium for culture of Drosophila melanogaster ?

(1) Moist bread

(2) Agar agar

(3) Ripe banana

(4) Cow dung

Subtopic:  Chromosomal Basis of Inheritance: Further Considerations |
 54%
NEET - 2006
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Phenotype of an organism is the result of :

(1) mutations and linkages

(2) cytoplasmic effects and nutrition

(3) environmental changes and sexual dimorphism

(4) genotype and environmental interactions.

Subtopic:  Monohybrid Cross: 1 |
 67%
NEET - 2006
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

In which mode of inheritance do you expect more maternal influence among the offspring ?

(1) Autosomal

(2) Cytoplasmic

(3) Y-linked

(4) X-linked

Subtopic:  Sex Determination |
NEET - 2006
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

How many different kinds of gametes will be produced by a plant having the genotype AABbCC ?

(1) Three

(2) Four

(3) Nine

(4) Two

Subtopic:  Dihybrid Cross: Details |
 64%
NEET - 2006
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints