Mutations that occur only in an egg or sperm cell, or those that occur just after fertilization is known as genetic mutation.

If a plant with round seeds has a parent that has wrinkled seeds, then, what is its genotype? (Assume that round is dominant.)  

A point mutation that changes a codon specifying an amino acid into a stop codon is called a ______________ mutation.

Down’s syndrome is caused by_________________ and the risk of conceiving an offspring with Down’s syndrome rises dramatically with the age of the ___________.

Nondisjunction is uneven distribution of chromosomes in meiosis. It causes aneuploidy and most aneuploidies cease developing as embryos.

Huntington’s disease is caused by a dominant allele. If one of your parents has the disease, then the probability that you, too, will have the disease is ___________%.

Cri-du-chat syndrome is associated with a missing chromosome number 5.

Give at least three differences between prokaryotic and eukaryotic cells. Also give  twoexamples of each type.

Every person has two copies of each gene, one inherited from each parent.

 An individual with the chromosomal description 45, X would be a _____.