Unit 5: Monohybrid Crosses Notes Video

Monohybrid crosses are only analyzing the possible outcomes of one (a)   .

A pea plant that has the alleles Yy produces yellow peas. Yy is the plant's (a)   . (Can't count the letters on this answer!)

What is the phenotype of a pea plant with at least one dominant T?

• tall

• short

• TT

• Tt

Which of the following are terms for Tt?

• heterozygous

• homozygous

• purebred

• hybrid

What letter would you use for green peas?

• G

• g

• Y

• y

Remember that the alleles (letters) represent the gametes, which are created during (a)   .

How many squares are yellow?

How many squares will be Yy in your Punnett square?

(a)  

What percent of the offspring are heterozygous?

• 0%

• 25%

• 50%

• 75%

• 100%

Before we answer this question, time for review: what does phenotype mean?