A normal sperm whose

chromosomes don't contain the sex chromosome that is responsible for life

can fertile a normal ovum and

a. Down's case occurs.

c. fetus death occurs

b. Klinefelter's case occurs.

d. normal male produces.

What happens during G 1 phase? -apex

When a single population evolves into two populations that cannot interbreed anymore ___ has occurred

When is mitosis a serious problem

What characteristics contribute to the success and ultimate fall of the persian empire?

How does a wolf get energy from the Sun

The failure of homologous chromosomes to separate during meiosis is called a. skin disorders b. translocation. c. nondisjunction. d. Down syndrome.

As the wavelength increases, the frequency (A) decreases and energy decreases. (B) increases and energy increases. (C) decreases and energy increases. (D) increases and energy decreases.

The most obvious source of gene flow into any population is A) Emigration B) Immigration

Polypeptides and proteins must fold properly to be functional. Hydrogen bonds between the oxygen and nitrogen atoms of the peptide bonds are crucial to which level of protein structure?1. primary structure2. tertiary structure3. secondary structure4.

A particular gene can have two forms, called alleles. which statement best describes the difference between the dominant allele and the recessive allele? (a) only the recessive allele is expressed when both alleles ate inherited.