PATHOLOGY

PATHOLOGY MCQ

GENETICS AND DISEASE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Dad-cancer (CY)Mom-cancer (Cc)C-Cancerc-no cancerCancer is X-linked.2. What are the odds that ALL CHILDREN will have cancer?
A
0%
B
25%
C
50%
D
75%
E
100%
Explanation: 

Detailed explanation-1: -If a parent has a gene fault, then each child has a 1 in 2 chance (50%) of inheriting it. So, some children will have the faulty gene and an increased risk of developing cancer and some children won’t. Being born with inherited faulty genes doesn’t mean that a person will definitely get cancer.

Detailed explanation-2: -Daughters have a 50% chance of inheriting the mutated X-linked gene from their mother and a 100% chance of inheriting the mutated X-linked gene from their father. Sons have a 50% chance of inheriting the mutated X-linked gene from their mother and a 0% chance of inheriting the mutated X-linked gene from their father.

Detailed explanation-3: -This doesn’t mean you’ll definitely get cancer if some of your close family members have it, but that you may have an increased risk of developing certain cancers compared with other people. It’s estimated that between 3 and 10 in every 100 cancers are associated with an inherited faulty gene.

Detailed explanation-4: -Practice ways to relax. Share your feelings honestly with family, friends, a spiritual adviser or a counselor. Keep a journal to help organize your thoughts. When faced with a difficult decision, list the pros and cons for each choice. Find a source of spiritual support. More items •13-Sept-2022

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