Down syndrome is characterized by cells having three copies of chromosome 21. as a somatic cell in an individual with down syndrome prepares to enter mitosis, how many chromatids would be present in the cell's nucleus?

term refers to a change in one species that results from a change in another species that it interacts with

What are the three rules for writing scientific names

2 Part Question "What would happen to a plant with green and yellow alleles if the two colors are Codominant" " How could a I breed all plants that would look like that?"

A man with the autosomal recessive disorder phenylketonuria (PKU) and a woman without PKU have a son named Peter, who does not have PKU. Peter is curious about whether his mother is a carrier for PKU. What facts would allow him to know?

Would weather exist without clouds?

Why is it necessary to do a spinal tap when you suspect a bacterial infection of the central nervous system? why can't you use a blood test?

Name the major greenhouse gasses and how they get into the atmosphere

Which type of cell goes through the determination process?

What organic molecule is the basis of enzymes.?

Which transport mechanisms require the formation of a vesicles to transport material into or out of the cell? A: diffusion and osmosis B: exocytosis and calcium pumps C: exocytosis and endocytosis D: diffusion and facilitated diffusion