Step 10
Zokkies are really sensitive to a recessive hereditary condition. It is a lethal affliction, causing malformation of the circulatory system in developing organisms. Embryos never reach their full size and the afflicted ones die before hatching. That is why Secunda wants to know the chance of getting eggs filled with embryos that suffer from this condition. The gene is linked ("lies on the same chromosome") to the “spot”gene and can be found as two different alleles: the normal protein is coded for by allele E, a protein with the wrong tertiairy structure is formed when only allele e is active in the phenotype.
This schematic karyogram shows the situations in the Primo, Secunda and Tertio:
This schematic karyogram shows the situations in the Primo, Secunda and Tertio:
What is the chance of getting children with this condition when Secunda partners with Primo? What are the chances when she chooses for Tertio?
Make sure to use the correct notation for this cross..
Make sure to use the correct notation for this cross..