Jack and Jill's first child was born with Tay Sach's disease, an autosomal recessive trait.?

Question

What is the probability that their second child will be able to roll his/her tongue and be normal (i.e. not have Tay Sach's)?

a. 9/16
b. 3/16
c. 3/8
d. 1/2
e. 3/4

thanks.

Answer 1

If the first child was bb (with Tay Sach's), then Jack and Jill were both Bb Bb with regard to Tay Sach's.

In the previous problem, they were Tt and tt for tongue rolling.

Their children have a 3/4 chance of being normal with regard to Tay Sach's (possibilities being BB, Bb, bB, bb) and a 1/2 chance of being a tongue roller.

In probability, AND means you have to multiply the fractions.
3/4 normal AND 1/2 tongue roller
3/4 * 1/2 = 3/8
Answer is C.

Answer 2

oftentimes contained in the busy global of Genetics, issues type of bypass a technology. in case you or your spouse, highly your spouse is a service their is a 60% or more advantageous threat that your grand little ones (woman) could inherit the decease. seem back on your family individuals heritage yours and hers as that's likewise a fantastic indicator of genetics in action, notwithstanding, in case you 2 have the recipe for starting up this decease it may ensue starting up at the same time with your grand little ones (ninety% threat) and (little ones 10%), and if it does oftentimes it really is the female that has the service gene. RD