150k views
2 votes
PLEASE HELP ME WITH THIS!! I'M STUCK!! PLEASE HELP ME WITH THIS!! I'M STUCK!!

Imagine that a new species is identified and the transmission of a trait for a horn is being studied. The presence of a horn is dominant and represented as H. The lack of a horn is recessive and represented as h. What genotype and phenotype probabilities would exist for a cross between a horned organism (HH) and a horned organism (Hh)?

User Olorin
by
5.4k points

1 Answer

6 votes

Step-by-step explanation:

When you make the cross. You get

HH HH Hh Hh.

So the genotypic ratio - 2:2 which is also 1:1.

The phenotypic ratio - 4. Since Hh and HH are horned organisms. So they only differ in their genotypic make up.

User Will Clarke
by
5.8k points