Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Observed phenotypic ratios of spine color for F1 offspring of white, green and purple urchins.
Green crosses (26 and 38) produced only green offspring. Green-purple crosses (11 and 36) produced the dual colored phenotype purple-green indicating that neither allele is dominant over the other. The green-white cross (37) produced white urchins, confirming white as the dominant allele.
