The answer is Meiosis in egg Formation.
Non disjunction is caused by the failure of paired chromosomes to separate during cell division. In meiosis it can occur in meiosis I and meiosis II, if it occurs in meiosis I, it means that at least one pair of homologous chromosomes did not separate. The end result is two cells that have an extra copy of one chromosome and two cells that are missing that chromosome.
I have some ideas , “does music effect on animal behaviour” and an experiment to that could be noticing the behaviour of a dog or cat without music then with music , i have more ideas if you don’t really like this one
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Centuries ago, living things were classified as either plants or animals. Today, the classification of living things helps us gain a better understanding of the world we live in, our relation to living things, and understanding Biology better overall.
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Hormones are a group of chemicals released by exocrine glands

These hormones are directly secreted into bloodstream from where they reach the site.