How many pairs of chromosomes does a male Drosophila fly have? Which one of these bears the gene for eye colour?

How many pairs of chromo-somes are present in male/fKHOale human?

One of the two set squares in your instrument box has angles of measure 30^(@) - 60^(@) - 90^(@) Take two such identical set - squares .Place them side by side to form a kite like the one shown here . How many lines of symmetry does the shape have ? Do you think that some shapes may have more than one line of symmetry ?

In human genome which one of the chromosomes has the most genes and which one has the fewest?

How many elements does a quadrilateral have? Name them.

How does gain or loss of chromosome (s) take place in humans? Describe one example each of chromosomal disorder along with the symptoms involving an autosome and a sex chromosome.