Question

1- why mothers are responsible producing for girl child​

Answer 1

Answer:

Explanation:

when it comes to decide the gender of the child during the process of the fusion, the mother always contributes the 'X' chromosome. ... If it's a 'X' chromosome, it will be a female child because female has the genotype of X-X. If it is a 'Y' chromosome, it will be a male child because male has the genotype of X-Y.

Answer 2

mothers are not responsible for the sex of the child.

mothers contribute only X chromosomes whereas the father contributes X and Y chromosome.

X from father and X from mother = XX (girl)

Y from father and X from mother = XY (boy)