Organisms belonging to the same faimly would be the most closley related.
A fossil would from through mineral replacement by replacing the existing material of the animals bones with minerals, to become petrified. The Minerals will keep the fossil preserved longer.
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A synonym for observation could be remark.
The ploidy level of the spores produced in the sporangium is haploid
First of all, hemophilia is an x-linked recessive and recessive disease. So it's a genetic disease.
- Therefore, there is no possibility of snatching it from his son. It can come from mom or dad. If the mother and father do not have this disease, as in the question, the mother carries this disease recessively. If it was a girl, she would be less likely to get the disease, as she would have to inherit the genotype of this disease from both the mother and the father. however, since her children are boys, she received the disease gene from the mother's recessive gene region. Therefore, the boy has hemophilia in the XhY genotype.
