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melamori03 [73]
3 years ago
6

A black mouse mates with a brown mouse, why are no brown offspring produced

Biology
2 answers:
raketka [301]3 years ago
8 0
The black mouse has a dominant gene and the brown mouse has a recessive gene
Eva8 [605]3 years ago
4 0
Because the black mouse is homozygous.

The black color in mouses is dominant, and the brown is recessive. When a parent is homozygous, their children need to have their gene. Because in this case the trait is black, it dominates brown in all children.

The table is BB×bb = Bb, Bb, Bb, Bb = 100% heterozygous genotype = 100% black phenotype.
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