Which one of the following conditions correctly describes the manner of determining the sex in the given example?
 
1. XO type of sex chromosomes determines male sex in grasshopper
2. XO condition in humans as found in Turner syndrome, determines female sex
3. Homozygous sex chromosomes (XX) produce males in Drosophila
4. Homozygous sex chromosomes (ZZ) determine the female sex in birds.
Subtopic:  Sex Determination |
 79%
From NCERT
AIPMT - 2011
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The probability of four sons to a couple is:

1. 1/4 2. 1/8
3. 1/16 4. 1/32
Subtopic:  Sex Determination |
From NCERT
AIPMT - 2001
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