Principle of Inheritance and VariationMedium
Question
In a population of a grasshopper species, the chromosome number of some members is 23 and some other members possess 24 chromosomes. The 23 and 24 chromosome-bearing members in this species are $\_\_\_\_$.
Options
A.females and males, respectively
B.all males
C.males and females, respectively
D.all females
Solution
Sol. [Key Concept: XO type sex determination in grasshopper]
In grasshopper sex determination is XX - XO type, in which, males have only one X-chromosome besides the autosome (XO), whereas females have a pair of X-chromosome, besides autosomes (XX). Therefore, the individual with 23 chromosomes is a male grasshopper and the one with 24 chromosomes is a female grasshopper.
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