1.Sickle cell anemia is an inherited disease in which red blood cells become distorted and deprived of oxygen. A person with two sickle cell genes will have thedisease, but a person with only one sickle cell gene will have amild, non-fatal anemia called sickle

cell trait. Using S to represent ahealthygene, and s the sickle cell gene thesicklecellgene, the table shows the four possibilities for the children of two S parents. Find the probability that these parents give birth to a child who is healthy ishealthy. That is comma the child does not have the disease or Thatis,thechilddoesnothavethediseaseor trait.

Second Parent

S

s

First Parent

S

s

SS

Ss

sS

ss

P(child is healthy =

(Typean integer or a simplifiedfraction.)

2.Let two cards be dealt successively, without replacement, from a standard 52-card deck. Find the probability of the event.

black card dealt second, given a black card dealt first The probability that the second is a black card, given that the first is a black card is___?.

(Simplify your answer. Typean integer or a fraction.)