The Manx Cat / heterozygous for the gene

Need help getting started Manx cats are distinctive because they do not have tails, their front legs are shorter than their rear legs and they often travel by hopping. These traits are controlled by a single gene. Manx cats are heterozygous for a dominant allele that causes these traits. Explain what type of of cross is required to prove Manx cats are heterozygous for the gene? How do I start?

A man who has free earlobes marries a woman who has attached earlobes. What would be the expected phenotypes (and ratios or percentages) of their offspring if the man is heterozygous?

I am having trouble with this type of setup not sure about how to set up Punnett square to answer questions concerning homozygous vs heterozygous

What are the possible phenotypes for a child whose mother had type AB blood and father who had A blood?

What are the possible phenotypes for a child whose mother had type AB blood and father who had A blood?

genotypes and phenotype ratios

What would be the expected genotypic and phenotypic ratios in the f1 and f2 generations, if flower color in carnations is controlled by co-dominant alleles and you begin with the P generation using pure, or true-breeding, carnations that have different (red & white) flower colors?

phenotypic ratio of a dihybrid cross

4 phenotypic combnations would include : dominant for both trait #1 & trait #2 Dominant for Trait #1 & Recessive for Trait#2 Recessive for Trait#1 & Dominant for Trait #2 Recessive for both Trait#1 & Trait #2