Perhaps you and/or your significant other is a carrier of a harmful recessive trait, such as...

Question:

Perhaps you and/or your significant other is a carrier of a harmful recessive trait, such as cystic fibrosis. What would you do when considering having children? Would you hope for the best and ignore the situation or would you see a genetic counselor or what?

Carrier for recessive trait

Heterozygous genotype is a carrier for recessive traits because it consist of one recessive allele and one dominant allele. It is said to be carrier because it will not exhibit any phenotype for the recessive trait while carrying the recessive allele.

Answer and Explanation:

I would consult a genetic counsellor for a better understanding of the situation and considering my options. This is because if both the partners are carrier for a recessive disease there is a 25% chance that the offspring will also get this disease as {eq}Aa*Aa = 1 AA : 2 Aa : 1 aa {/eq}. 1 out of four children is likely to get this recessive disease due to the presence of both recessive alleles in its genotype which will be inherited from both the parents.


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Pedigree Analysis in Human Genetics: Inheritance Patterns

from Biology 102: Basic Genetics

Chapter 6 / Lesson 3
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