What are the chances of son having colour blindness if his mother is carrier (XCXc)?
a) 25%
b) 50%
c) 75%
d) 100%
Explanation: son receives X chromosome from mother which may be XC (colour blind) or Xc (normal)
What are the chances of son having colour blindness if his mother is colour blind (XCXC)?
a) 25%
b) 50%
c) 75%
d) 100%
Explanation: all the sons will be colour blind because each son receives on XC from his mother
What are the chances of son having colour blindness if his father is colour blind (XCY)?
a) 25%
b) 50%
c) 75%
d) 0%
Explanation: sons do not receive XC from father. They receive Y from him
What are the chances of daughter having colour blindness if her mother is colour blind (XCXC) and father is normal (XcY)?
a) 25%
b) 50%
c) 75%
d) 0%
Explanation: all the daughters will be carrier for colour blindness (XCXc) because each daughter receives one XC from his mother and another Xc from father
What are the chances of daughter having colour blindness if her mother is carrier for colour blindness (XCXc) and her father is normal (XcY)?
a) 25%
b) 50%
c) 75%
d) 0%
Explanation: half of the daughters will be carrier for colour blindness (XCXc) half will be normal (XcXc)
What are the chances of daughter having colour blindness if her mother is carrier for colour blindness (XCXc) and her father is colour blind (XCY)?
a) 25%
b) 50%
c) 75%
d) 0%
Explanation: half of the daughters will be carrier for colour blindness (XCXc) half will be colour blind (XCXC)
