Edward was found to be heterozygous(Ss) for sickle-cell trait. The alleles repre

Question

Edward was found to be heterozygous(Ss) for sickle-cell trait. The alleles represented by the letters S and s are:
a)on the X and Y chromosomes
b)linked
c) on homologous chromosomes
d)both present in each of Edward's sperm cells.
e)on the same chromosome but far apart.

Whether an allele is dominant or recessive depends on:
a)how common the allele is, relative to other alleles.
b)whether it is inherited from the mother or father
c)which chromosome it is on
d) whether it or another allele determines the phenotype when both are present
e) whether or not it is linked to other genes

Explanation / Answer

The alleles represented by the letters S and s are: c) on homologous chromosomes Whether an allele is dominant or recessive depends on d) whether it or another allele determines the phenotype when both are present

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