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Title: If both parents are heterozygous w/ a dominant trait...? Post by: irina on Sep 15, 2012 I both parents are EX. Dd would the percent chance of the child having this dominant trait be 100% ?
Title: If both parents are heterozygous w/ a dominant trait...? Post by: smag on Sep 15, 2012 No, it would be 75%. If both parents pass on the recessive allele, the child will not have the dominant trait.
Title: If both parents are heterozygous w/ a dominant trait...? Post by: mireille on Sep 15, 2012 No, 75%.
P = Dd x Dd ..........D.........d .....-------------------- D...|..DD......Dd d...|..Dd.......dd DD = 25% Dd = 50% dd = 25% DD and Dd individuals have the dominant trait, so that's 50% + 25% = 75% of offspring that are expected to had the dominant trait. |