A couple discovers that their unborn fetus has trisomy 13, Patau's syndrome. This mutation could occur from which of the following nondisjunction (NDJ)
events?
NDJ during Meiosis l in the mother's oocyte
NDJ during Meiosis II in the mother's oocyte
NDJ during Meiosis l in the father's spermatocyte
NDJ during Meiosis II in the father's spermatocyte
NDJ during any of the above

Astudent visits the beach during a very hot day she steps on the santa and jumps because it is so hot what type of heat transfer is demonstrated by the sand in this example

The construction of phylogenetic trees is a mapping out the proposed divisions and common ancestors of all living species. traditionally, these trees have been built using morphological data, such as appearance and embryology. recently, it has been possible to construct these trees using molecular data. phylogenetic trees based on different types of information agree with each: that there is strong evidence of a real underlying common descent. this phylogenic tree is composed based on molecular data (rrna). what statements can we infer are true about the organisms throughout the tree? because the tree is rooted, all branches share a common ancestor. all organisms have some sort of cellular structure/organization. all eukaryotes evolved from bacteria. since the organisms contain rna, they share the same dna. if the organisms contain rna, the share the same four nitrogen bases.

The activity of the modern sample is 1.10 bq . how long does that measurement take?