Question

The pedigree chart below shows the individuals in a family who exhibit a certain trait. Based on the information in the chart, what two conclusions can be drawn?(Two answers need to be selected.)
A. It is a recessive trait.
B.It is a dominant trait.
C.Individual 12 is homozygous for the trait.
D.Individual 12 is heterozygous for the trait.

Answer 1

You can tell it's not a dominant trait because it would show in all the grandchildren.
 
 Recessive
 #12 is heterozygous

Answer 2

Answer:

The correct statements would be:

• A. It is a recessive trait.
• D.Individual 12 is heterozygous for the trait.

The given pedigree is of autosomal recessive trait.

It can be confirmed by observing the cross of III- 4 and 5 which do not show the trait, but their offspring 1 had the trait.

It is only possible when the trait is recessive and both 4 and 5 are heterozygous for the trait.

In addition, individual 12 must be heterzogous dominant for the trait. It is because the trait is recessive and individual 12 does not show the presence of the trait.