Chapter 12 Test-Genetics

Front

What term describes organisms with two identical alleles for a particular trait?

Back

Homozygous

Front

If a heterozygous tall pea plant is crossed with a short plant, what is the probability that their offspring will be tall?

Back

50%

Front

If a pea plant's alleles for height are tt, what can be said about its parents?

Back

Both parents contributed a recessive allele.

Front

What are the different forms or variations of a gene called?

Back

Alleles

Front

Why did Gregor Mendel remove the male parts from the flowers of some plants?

Back

To control crosses between plants.

Front

What is the term for the physical expression of a trait in an organism?

Back

Phenotype

Front

What is the genetic makeup of an organism called?

Back

Genotype

Front

What is the term for a cross between two individuals that involves one trait?

Back

Monohybrid cross

Front

What is the expected phenotypic ratio in the offspring of a monohybrid cross between two heterozygous parents?

Back

3:1

Front

What is the principle that states that alleles for different traits are distributed to gametes independently of one another?

Back

Law of Independent Assortment