Punnett Square Basics Interactive Video 2025

A ​ (a)   is a physical characteristic of an organism like hair color. A(n) ​ (b)   is a different form of a trait (or gene) and are often written as letters.

• trait
• allele
• punnett square

Place the terms under the correct genotype categories.

Groups:

(a) Homozygous

,

(b) Heterozygous

• DD

• dd

• Same

• Dd

• Different

Dominant traits are written with a capital letter. A recessive trait is written with lower case letters.

• True

• False

How much does each punnett square box represent in a monohybrid cross?

• 10%

• 20%

• 25%

• 50%

• 100%

Are you enjoying the video lesson?

• Yes

• No

The parents' genotypes (letters) go on the ​ (a)   of the punnett square. The offsprings (children) genotype go on the ​ (b)   of the punnett square.

• outside
• inside
• in between

In the problem, what are the possible genotypes (LETTER COMBINATIONS) of the offspring (children)?

• 100% TT

• 25% TT; 50% Tt; 25% tt

• 75 % Red ; 25% white

• Cannot determine

What percentage of the offspring will be RED?

• 25%

• 50%

• 75%

• 100%

Genotype is an organism's genetic information (alleles, letter combinations, homozygous, heterozygous...)

Phenotype is an organism's Physical appearance or LOOKS (colors, shapes, textures). Place the words under the correct category.

Groups:

(a) Phenotype

,

(b) Genotypes

• Tt

• TT

• Red

• tt

• Tall

• Heterozyous

• Wrinkled

• Rough

• Homozygous

• Smooth

In the Punnett square, the color​ (a)   is represented by ​ (b)   dominant and is dominant to the color​ (c)   ​ (d)   . The offspring's genotype is 50% Gg and 50% gg. The offspring​ (e)   is 50%​ green and 50% yellow.

• green
• G
• yellow
• g
• white
• phenotype
• GG
• genotype