The shape of a heliodor is an X-linked trait. Male heliodors inherit two X chromosomes, while the females inherit an X and a Y chromosome. The recessive allele codes for the common bell-shape  while the dominant phenotype is a round shape . Hudson is a round male and has offspring with Heidi, a bell-shaped female. They already have one daughter, Hannah, who is shaped like her mother. The reason for your answer above is:   a.Females heliodors inherit two X chromosomes, so it is less likely they would only inherit two recessive alleles for being bell-shaped.   b.Males heliodors inherit two X chromosomes, so it is less likely they would only inherit two recessive alleles for being bell-shaped.   c.Males only need to inherit one recessive allele to be bell-shaped.   d.Being male or female has no impact on the shape of a heliodor

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A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.