Question

Give reasons --
(1) Sex of a child is depend upon father but it is the matter of chance.
(2) Two childs of a same parents are different.
(3) High concentration of carbon dioxide decreases rate of the photosynthesis.

Answer 1

1) father contributes either X chromosome or Y chromosome. If Y comes then it will be male and if X comes it will be girl.
2) in the first child the chromosome are different from those of the second child bcoz only half-half chromosomes of male and female are there.
3) if the carbon dioxide is more it does not act as a catalyst so the rate decreases as it is the heavy.

May it helps you......

Answer 2

reason are given below ;- .

1) yup sex of a child is depend on father , this is because male gametes contains x and y pair of chromosomes ,

and ,

female gamete contains of xx pair of chromosomes , so , during fusion if father's x chromosome combined with mother's x than sex of the child will female and if fathers y chromosome combine with mother's x chromosomes than the sex of child will be male .

so, we can say that sex of a child is depend upon father but it is a matter of chance , cause anything happen with during fusion .

2. yup, two child of a same parents are different because , during fusion process the gene of father and mother combine and form every time a new type of gene .

maybe it happens when one child has brown hair and other has black hair , this is because of gene variation or,
this variation comes because of recessive and dominant genes. if father has black hair and mother has Brown hair . but the mothers hair gene is recessive and father hair gene is dominant than mothers gene will transfer to the child and give the child brown hair.

3. yes , high concentration of co2 decreases process of photosynthesis :-

An increase in the concentration of carbon dioxide gives an increase in the rate of photosynthesis. yes , this is true but , ... Here a rise in carbon dioxide levels has no affect on the rate of photosynthesis as the other factors such as light intensity become limiting.

hope it helps !!

☺☺