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single gene
A carrier is a person who carries a gene(most-likely for a genetic disorder) but do not have the trait controlled by the gene.
Rare X-linked recessive
There could be several answers to this, but some most likely ones would be that they both: have very basic structures or can be pathogenic.
b the likelihood of an event occurring apex
m
nonmendelian principles
The dominant overpowers the recessive traits. The dominant trait is the trait the the offspring will most likely have.
An inability to adapt to its environment would likely be the most common.
lifespan
The vestigial gene is the trait most likely linked to having a curved wing in the fruit fly. Flies with vestigial wings cannot fly.
Wind sucking, weaving, crib biting...
single gene
twin studies
Most likely from another relative as a recessive trait.
No it is most likely but it is not guaranteed. Both of my parents don't have widows peaks yet i have a widows peak.
The offspring would have a 50% chance of being heterozygous and showing the dominant trait and a 50% chance of being homozygous for the recessive trait.