Monohybrid cross

In watermelons, green rinds (G) are dominant to striped rinds (g).  What is the genotype of a heterozygous green watermelon?

• GG
• Gg
• gg
• green

In cacti, long arms (A) are dominant to short arms (a).  Suppose 2 heterozygous cacti are crossed.  What percentage of their offspring are expected to have short arms?

• 0%
• 25%
• 75%
• 100%

One of the two forms of a gene is called a(n)

• genotype
• allele
• hybrid
• trait

When a person has two different alleles for a gene, they are said to be

• heterozygous
• homozygous

A __________ allele always shows up in an organism when the it is present.

• dominant
• hybrid

In this example, the child displays the ________ trait.

• dominant
• recessive 

How many alleles (letters) do each person carry for a trait?

• 1
• 2
• 3
• 4

How many alleles (letters) does a child get from each parent for each trait?

• 1
• 2
• 3
• 4

Dominant alleles are represented by a:

• Male gene
• lowercase letter
• recessive trait
• capital letter

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes