Homozygous- Having two identical alleles
that code for the same trait.
Phenotype- The physical characteristic expressed by a gene. 
Carrier- A heterozygous individual who has an unexpressed recessive gene for a trait  
Can a mom with A blood and a dad with B blood have children
with O blood? 
Yes
Can a Mom with hemophilia and a dad that is normal have
children with hemophilia? 
Yes, if it is a boy. 
 
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