In an African tribe, there is a dominant HbT allele, which encodes the sickling form of...
In an African tribe, there is a dominant HbT allele, which encodes the sickling form of hemoglobin when homozygous. There are 98 HbA/HbA individuals, 62 HbA/HbT individuals and no HbT/HbT individuals. What type of inheritance is this?
Mendelian inheritance
Blended inheritance
Dominant lethal
Recessive lethal
Polygenic
Homework Answers
The alllele HbT only shows lethality in homozygous form but not in heterozygous form. Which means the other allele HbA is dominant over it or HbT is recessive to HbA.
So HbA/HbA and HbA/HbT do not show lethal character but HbT/HbT shows lethal character and thus there is no HbT/HbT individual in the community.
So the HbT genes act as a recessive gene which only expresses in homozygous condition. Thus this is a form of Recessive lethal inheritance.
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