In a species of mammal, black fur colour is dominant and brown fur colour is recessive.
Two parents with black fur produce offspring which all have black fur. Later that year, the same parents produce more offspring. One of these offspring has brown fur.
Which statement about fur colour is correct?
Both parents are heterozygous.
2 )
Only one of the parents is heterozygous.
3 )
Both parents are homozygous.
4 )
Only one of the parents is homozygous.
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