Genetics & Punnett Squares

Which of the following alleles is homozygous (purebred) recessive?

• Tt
• tt
• TT
• t

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous genes
• mutated DNA

Tags

NGSS.MS-LS4-4

Aa is

• homozygous (purebred)
• heterozygous (hybrid)

In a heterozygous (hybrid) genotype, the ___________ allele takes over in the phenotype.

• recessive
• dominant
• lower case letter
• both 

G = green, g = yellow
The genotype for a yellow plant is...

• GG
• Gg
• gg
• all of the choices result in yellow

Tags

NGSS.MS-LS3-1

T = tall an t = short
What is the phenotype for Tt?

• short
• tall
• medium sized
• neither tall or short

Tags

NGSS.MS-LS4-4

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

Tags

NGSS.MS-LS3-2

Which of the following is homozygous (purebred) dominant?

• Yy
• Y
• yy
• YY

The passing of physical characteristics from parent to offspring is __________.

• genetics
• heredity
• genes
• traits

Tags

NGSS.MS-LS3-2