OH1995
Member
- Joined
- Nov 7, 2011
- Messages
- 150
- Gender
- Male
- HSC
- 2013
Exactly. Why would you need to guess? It was one of the simplest pedigree diagrams. In HSC Biology there are only 2 certainties you need to be aware of in pedigrees.It can't have been dominant because two parents without the trait had a child with the trait, and it can't have been co dominant because we were only looking at one trait, and also because we know it was recessive due to the reason above
1) If 2 parents WITHOUT the condition have a child with the condition the trait is RECESSIVE.
2) If 2 parents BOTH HAVE the condition and they have a child WITHOUT the condition then the trait is DOMINANT.
Just remember those 2 things whenever looking at a pedigree.