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Pea plants were particularly well suited for use in Mendel’s breeding experiments for all of the following reasons except that peas do not show the easily observed variations in a number of characters, such as pea shape and flower color.

A _______________ mutation removes DNA where as an ____________ mutation adds DNA.

Metacentric chromosome has two _____ arms, submetacentric chromosome has ______________ arms and acrocentric chromosome have centromere ______________.  

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 ___________.

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 ___________%.

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

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