The melanocortin 1 receptor (MC1R) gene shows different patterns of inheritance depending on whether it is the RCH or RWH variant. The RCH variant exhibits complete dominance, increasing melanoma risk when homozygous. The + variant shows codominance with RCH, reducing risk in heterozygous and homozygous individuals. The + variant shows incomplete dominance with RWH, as heterozygous individuals have intermediate melanoma susceptibility.

1. What pattern of inheritance does variant have with the RCH gene at the organismal level?
(codominance,incomplete dominance,complete dominanace)
What pattern of inheritance does variant have with the RWH gene at the organismal level?
(codominance, incomplete dominance, complete dominance)
The melanocortin 1 receptor (MC1R) has emerged as a melanoma susceptibility gene. The +
variant reduces the susceptibility in homozygous or heterozygous individuals with the RHC
variant. The RCH variant increases the probability of melanoma when homozygous. There is a
mutant version of the RCH variant called RWH. When heterozygous individuals present the
RWH and + variants, they show an intermediate susceptibility to melanoma. What pattern of
inheritance does + variant have with the RCH gene at the organismal level? Codominance What
pattern of inheritance does + variant have with the RWH gene at the organismal level?
Incomplete dominance