In humans, sex is determined by
two homologous chromosomes
a dominant gene for maleness present in a male
two similar sex chromosomes in the male and dissimilar in the female
the differences in the nature of the X and Y chromosomes in the male
Correct answer is B
No explanation has been provided for this answer.
The name given to a sudden change in a gene or chromosome that can be passed on to the offspring is
inheritance
linkage
alleles
mutation
Correct answer is D
No explanation has been provided for this answer.
Which of the following is not a morphological variation in human beings?
Size
Blood groups
Colour
Fingerprints
Correct answer is B
No explanation has been provided for this answer.
3 : 1
2 : 1
1 : 3
1 : 2
Correct answer is C
No explanation has been provided for this answer.
Which of the following statements about blood groups in human is not correct?
Siblings may not belong to the same blood group
There are four possible blood groups
People with blood group O can receive blood from all other groups
People with blood group AB are universal recipients
Correct answer is C
No explanation has been provided for this answer.