Which of the following is correct ?

(1) Henking discovered the small Y-chromosome.

(2) Drosophila also shows XX-XY sex determination like human.

(3) Birds have ZZ-ZW sex determination, where females are ZZ and males are ZW.

(4) Grasshoppers show XX-XY sex determination. 

Subtopic:  Sex Determination: Further Considerations |
 81%
From NCERT
AIIMS - 2011
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 of the following is true for a recessive disease in family A and B?

(1) In family A, both the parents are homozygous recessive.

(2) In family B, both the parents are homozygous dominant.

(3) In family B, both the parents are heterozygous recessive.

(4) In family A, both the parents are heterozygous recessive. 

Subtopic:  Pedigree Analysis: Problem Solving |
 60%
AIIMS - 2013
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Which of the following occurs due to monosomy of sex chromosome?

1. Down's syndrome

2. Turner's syndrome

3. Haemophilia

4. Sickle cell anaemia

Subtopic:  Sex Aneuploidy - Turner & Klinefelter Syndrome |
 82%
From NCERT
AIIMS - 2014
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

advertisementadvertisement

In rabbits, the gene for grey fur (G) is dominant over that for black fur (g). In a litter, if 50% rabbits are grey, then the possible parental cross combination is 

(1) GG X Gg

(2) GG X GG

(3) gg X gg

(4) Gg X gg.

Subtopic:  Monohybrid Cross: 1 |
 77%
AIIMS - 2015
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

Barr Body is found in the cytoplasm during 

(1) interphase in cell of female mammal

(2) interphase in cell of male mammal

(3) prophase in cell of female mammal

(4) prophase in cell of male mammal.

Subtopic:  Chromosomal Basis of Inheritance: Introduction |
 59%
AIIMS - 2015
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

If both parents are carriers for thalassaemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?

(1) 25%

(2) 100%

(3) No chance

(4) 50%

Subtopic:  Mendelian Disorders: Thalassemia |
 55%
AIIMS - 2016
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

If 'A' represents the dominant gene and 'a' represents its recessive allele, which of the following would be the most likely result in the first generation offspring when Aa is crossed with aa ?

1. All will exhibit dominant phenotype.

2. All will exhibit recessive phenotype. 

3. Dominant and recessive phenotypes will be 50% each.

4. Dominant phenotype will be 75%.

Subtopic:  Monohybrid Cross: 1 |
 84%
From NCERT
AIIMS - 2016
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 a pea plants, green pod colour is dominant over yellow pods. 1000 seeds taken from a pea plant on germination produces 760 green pod and 240 yellow pod plants. The parental genotype and phenotype of the seed plant are 

(1) Heterozygous and yellow

(2) heterozygous and green

(3) homozygous and yellow

(4) homozygous and green

Subtopic:  Monohybrid Cross: Further Understanding |
 73%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

A colourblind man marry with a daughter of colourblind father, the generation will be 

(1) there will be no daughter colourblind

(2) all sons will be colourblind

(3) all daughter will be colourblind

(4) half sons will be colourblind

Subtopic:  Sex Linked Recessive Inheritance |
 68%
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

advertisementadvertisement

In a plant, red fruit (R) dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTT genotype is crossed with a plant that is rrtt. Then

(1) 25% will be tall with red fruit

(2) 50% will be tall with red fruit

(3) 75% will be tall with red fruit

(4) All of the offspring will be tall with red fruits 

Subtopic:  Dihybrid Cross Analysis |
 64%
From NCERT
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