Question

Procedure 8.6 PREDICTING INHERITANCE John has a double row of eyelashes, which he inherited from his mother as a dominant trait. His mother has this trait. His maternal grandfather is the only other relative to have the trait. Veronica, a woman with normal eyelashes, falls in love with John's eyelashes and they marry. Their first child, Anna, has normal eyelashes. Now Veronica is pregnant again and hopes for a child with a double row of eyelashes. 1. Draw a pedigree of this family. Include all of the relatives mentioned. 2. What percent chance does John and Veronica's child have of inheriting double eyelashes? Use a Punnett square to determine a percent chance. ELILLA 168 Genetics Laboratory

Answer 1

Thanks

Grandfathen brandmother VR or -has the trait - doesn't have Methen Father Veronica John Anna Let's represent the trait by 3 and dallate where I is dominant and d is recessive so, Anna's genotype = dd Cnormal Veronica's genotype ² dd Chormal) John's genetype - Dd Colouble row) [ John get "D" allele from his mother and d allele from his fathen] Parrent D x dd Mother hamete - fathen Dd 2. Parent Gamete Veronica 6 6 @ Dd dd . The couple have of eyelashes. 50% chance of child with double rows