Organisms consist mostly of four elements. They are carbon, hydrogen, oxygen, and
a. iron.
b. chlorine.
c. silicon.
d. nitrogen.
e. phosphorous.
D
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Which of the following would be an accurate comparison of mitosis and meiosis?
1.Mitosis takes place in animals; meiosis takes place in plants. 2.Mitosis gives rise to cells that are genetically identical; meiosis gives rise to cells that have half the amount of genetic information as the original cell. 3.Mitosis takes place for producing eggs and sperm; meiosis takes place for growth and repair of damaged tissue. 4.Abnormal cell growth would be due to errors in meiosis.
During parturition, the process of the uterus moving up towards the baby's head is called ____________
Fill in the blank(s) with the appropriate word.
Two characters that appear in a 9:3:3:1 ratio in the F2 generation should have which of the following properties?
A) Each of the traits is controlled by single genes. B) The genes controlling the characters obey the law of independent assortment. C) Each of the genes controlling the characters has two alleles. D) Four genes are involved. E) Sixteen different phenotypes are possible.
During prophase ____ are formed.
A. nucleoli B. new chromosomes C. spindles D. centromeres