Kip studies flower color in petunias, where the allele for red flowers, r, is dominant to the allele for white flowers, r. if kip makes the cross rr x rr, the gametes that are produced
will all carry the r allele.
will all carry the r allele.
by one parent will carry r and by the other parent will carry r.
by one parent will carry rr and by the other parent will carry rr.

Crinoids, also known as sea lilies, appear to be sea plants but are not plants at all. crinoids are an echinoderm species which uses anchoring structures called holdfasts to attach themselves to the sea floor. crinoids were most abundant in pennsylvania during the mississippian period, which ranged from 375 to 320 million years ago. fossils of the crinoids shows that during most of this time pennsylvania was that provided favorable conditions for crinoid growth. a) glacial terrain b) a dry and sandy plain c) mostly mountain ranges d) covered by warm, shallow seas