What are the chances a
heterozygote passes on
either a dominant or
recessive allele?

A parent with one copy of a dominant allele and one recessive coded Ww for the widow's peak  is called heterozygous for a trait and has a 50 percent chance of passing on the dominant allele to each of his or her offspring, regardless of the gene inherited from the other parent.

Explanation:

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humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.