Law of Dominance

2 IDENTICAL alleles for the same trait. John has 2 genes for brown eyes so he is ___

• dominant

• recessive

• homozygous

• heterozygous

DIFFERENT alleles for the same trait. Sally has 1 gene for brown eyes and 1 gene for blue eyes so she is ___

• dominant

• recessive

• homozygous

• heterozygous

The gene that is expressed (stronger). Brown eyes are ___ over blue.

• dominant

• recessive

• homozygous

• heterozygous

The gene that is hidden (weaker) unless both genes are present.

• dominant

• recessive

• homozygous

• heterozygous

A specific characteristics. Mendel looked at 7 different ___ in peas such as color and shape.

• trait

• allele

• self-pollination

• cross-pollination

One of a number of different forms of a gene. The two ___ for pea color is yellow and green.

• traits

• alleles

• self-pollination

• cross-pollination

Mendel took the pollen from one pea plant and placed it onto the pistil of a second pea plants. This is ___.

• trait

• allele

• self-pollination

• cross-pollination

John has 2 genes for blue eyes. His GENEOTYPE is __

• homozygous

• heterozygous

Sally's genotype is heterozygous. Her genotype is written as ....

• D D

• D d

• d d

A sequence of DNA that codes for a protein and thus determines a trait. There are hundreds of ___ on each chromosome.

• gene

• phenotype

• genotype

• probability