A sinistral shelled female snail having Dd gene complement breeds with dextral sheeled male snail havig dd gene component what tuype of shell be present in the progeny?

A sinistral shelled female snail has Dd genotype cross with dextral shelled male having dd genotype. What type of shell will be present in the progeny?

If a female having gene for haemophilia and colour-blindness on its one X-chromosome marries a normal male then what are the chances in their offsprings :

If a female having gene for haemophilia and colour-blindness on its one X-chromosome marries a normal male then what are the chances in their offsprings :

Cross-breeding I. refer to the cross of superior male of one breed with superior female of another breed. II. it helps to accumulate the desirable genes of the two breeds into a progeny. III. the progeny may be used for commercial production. Which of the statements given above are correct?