The genotype of the mother must be heterozygous.
<h3>Punnet' square</h3>
In order to obtain a probability of 25% red-eyed males from the offspring, the mother must be heterozygous for the trait. The father can be of any genotype.
Thus, the likely genotype combination that will result in 25% red-eyed males are:
x 
and 
When you cross the first one above, the genotype of the offspring would be
.
The second cross will give offspring with the genotypes 
Both crosses give a 25% chance of producing re-eye males.
More on Punnet's square can be found here: brainly.com/question/3154616
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Answer:
continuous supply of oxygen to the cells. oxygen is extracted from the atmospheric air in the lungs, and carried by the bloodstream through the circulation to the tissue
I believe they were the spleen and thymus.
The presence of drugs or chemicals in an organism's environment can also influence gene expression in the organism. Cyclops fish are a dramatic example of the way in which an environmental chemical can affect development.