Home
Class 12
BIOLOGY
Sex determination in grasshoppers,humans...

Sex determination in grasshoppers,humans,and Drosophila is similar because:

A

Femals are hemizygous

B

males have oneX-chrosome and femals have two X-chrosomes

C

all males always have one Y-chromosome in all three species

D

The ratio of autosomes to sex chrosomes is the same in all three organism

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question about the similarity in sex determination among grasshoppers, humans, and Drosophila, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Sex Chromosomes**: - In humans, grasshoppers, and Drosophila, sex is determined by the presence of specific sex chromosomes. - Males typically have one X chromosome and one Y chromosome (XY), while females have two X chromosomes (XX). 2. **Analyzing the Options**: - **Option A**: "Females are hemizygous" - This is incorrect because females have two X chromosomes, making them homozygous for the X chromosome. - **Option B**: "Males have one X chromosome and females have two X chromosomes" - This is correct. In all three organisms, males have one X chromosome, while females have two. - **Option C**: "All males always have one Y chromosome in all three species" - This is not true for grasshoppers, as they do not have a Y chromosome; they have a different mechanism for sex determination. - **Option D**: "The ratio of autosomes to sex chromosomes is the same in all three organisms" - This is misleading as the number of autosomes can vary between species. 3. **Conclusion**: - The correct answer is **Option B**: "Males have one X chromosome and females have two X chromosomes." This reflects the similarity in sex determination across these species. ### Final Answer: The similarity in sex determination in grasshoppers, humans, and Drosophila is that males have one X chromosome and females have two X chromosomes (Option B). ---
Promotional Banner

Similar Questions

Explore conceptually related problems

Sex Determination In Humans

Sex mechanism in Drosophila is

Sex determination by chromosome diffrence in man and Drosophila is by mechanism called :

Sex determination in Drosophila melanogaster is based on :

Genetic basis OF inheritance;Sex Determination in Humans Human Karyotype Drosophila Karyotype Genic Balance Theory OF Sex Cytoplasmic/Maternal Inheritance

Morgan used Drosophila as experimental material because

Explain the mechanism of sex determination in insects like Drosophila and grasshopper.

Explain the mechanism of sex determination in insects like Drosophila and grasshopper.

In Drosophila sex is determined by