What happens during crossing over? homologous chromosomes trade pieces of dna. sister chromatids form tetrads and line up randomly. tetrads separate and produce two haploid daughter cells. spindle fibers form and attach to centromeres.

Look at the images of different rocks. which rocks have a fine-grained texture? check all that apply. 1 2 3 4 5

Pls quickly! which of the following is true about the behavior of an organism? a. the behavior of an organism is influenced by both its heredity and it’s environment. b. the behavior of an organism is influenced only by the treats it inherits from its parents. c. the behavior of an organism is influenced only by the environment in which it lives in. d. the behavior of an organism is not influenced by either it’s heredity or its environment.

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.