Question

Anyone here good at Pedigree of family trees? I'm confused on how to determine dominant and recessive outcomes

Answer 1

ill try and help if i can

Answer 2

If a trait just pop's out from nowhere (i.e. it was not visible in the parents), then it has to be recessive.

Answer 3

The mother had the trait to begin with, but the father was clear, by generation 2 a daughter with the trait, married someone with the trait as well in which their offspring were 2 with the trait, one clear, and 2 with the full disease

Answer 4

1.) Since the male as well as female have the trait, it is not sex linked, i.e. it is present on the autosomes.
2.) Since the trait is present (inherited) in all the generations i.e. it does not diappear in one generation and pop out in the next, it is Dominant.

Let the trait be represented by A, which is dominant i.e. if 'A' is present, the trait will be visible. The normal allele is 'a'( no trait visible)

Therefore, the father is homozygous recessive (aa) for the trait, the mother may be homozygous dominant (AA) or may be heterozygous (Aa).
Their child (daughter) is Heterozygous (Aa).
Now in order to get a normal child, the husband HAS to be Heterozygous (Aa).

Answer 5

In the last sentence, the husband is the daughter's Husband.

Answer 6

Thank you dams!