When homologous chromosomes cross over, what occurs?

this happens between prophase I and metaphase I

Explanation:

Explanation:

during crossing over , homologous chromosomes come together in order to form a tetrad . This close contact allows the nonsister chromatids from homologous chromosomes to attach to one another and exchange nucleotide sequences.

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme

the dna of humans and mice is almost 92% similar. this similarity indicates that . mice have a tail, while humans have a tailbone. the tailbone is a structure in humans.yes it's true.