Why do i have an extra 35 chromosmes

Draw the structure of dna nucleotide with adenine as nitrogenous base

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing

What are the student's observations and inferences before he starts his investigation?