In a certain population, there exists a recessive disease which causes death bythe age of 5 years. You study this population and discover that all thehomozygous recessive individuals have died. Two years later, you findhomozygous recessive individuals are back in the population. There has been nogene flow, so from where did these individuals come?

Name: In a certain population, there exists a recessive disease which cause
Uploaded: 2024-03-20T06:43:04.000Z
Channel: Bartleby
Description: In a certain population, there exists a recessive disease which causes death bythe age of 5 years. You study this population and discover that all thehomozygous recessive individuals have died. Two years later, you findhomozygous recessive individua

A gene is a part of the DNA molecule which can transcribed into a meaningful molecule called protein. An allele is a variant of gene. For a certain gene there are two allele- 1) Dominant and 2) Recessive So a person will have 3 combination of allele for a gene - a) Homozygous dominant (represents as AA) b) Homozygous recessive (represents as aa) c) Heterozygous (represents as Aa)In a population all 3 types of allele combination exist i.e. - AA, aa and Aa. In the question it is stated that homozygous recessive (aa) will dead by the age of 5. and after 2 years they appear again. The reason behind this is cross between two heterozygous dominant person in the population. Aa X Aa A a A AA Aa a Aa aa Here as you can see two heterozygous dominant person cross will results in following F1 generation - 25% Homozygous dominant (AA) 50% heterozygous dominant (Aa), and 25% Homozygous recessive (aa)So in a population when two heterozygous people cross, a homozygous recessive population will produce.