Genetics Intro Extension

Match the following genotypes to the correct name.

• Homozygous dominant

• Aa

• Heterozygous

• aa

• Homozygous recessive

• AA

The different versions of a gene are called...

• nucleotides
• chromosomes
• genes
• alleles

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

A dominant allele is represented by a ​ (a)   letter. While a recessive allele is represented by a ​ (b)   letter.

• capital
• lowercase
• bold
• italic 

Which of the following genotypes would NOT show the dominant trait?

• homozygous dominant with a different trait (e.g., 'BB')
• heterozygous (e.g., 'Aa')
• homozygous dominant (e.g., 'AA')
• homozygous recessive (e.g., 'aa')

Tags

NGSS.HS-LS3-1

Match the genotypes below to the phenotype that would be shown.

Groups:

(a) Dominant

,

(b) Recessive

• ee

• yy

• Ee

• YY

• Gg

• Kk

• kk

• gg

• aa

• AA

Tags

NGSS.HS-LS3-1

Straight hair is dominant to curly. The two phenotypes that could produce straight hair are SS and ​ (a)   becuase they have the ​ (b)   allele. The genotype that would produce curly hair would be ​ (c)   because it has two ​ (d)   alleles.

• Ss
• dominant
• ss
• recessive

If you cross parents that have the following genotytpes; Rr x rr, what percent of the offspring would be round if Round is dominant to wrinkled?

• 50%
• 100%
• 75%
• 25%

If you cross parents that have the following genotytpes; Rr x Rr, what percent of the offspring would be round if Round is dominant to wrinkled?

• 100%
• 75%
• 25%
• 50%

In pea plants, purple flowers are dominant to white. If two white flowers are crossed, what percentage of the offspring would have white flowers?

• 50%
• 100%
• 75%
• 0%

In pea plants, purple flowers are dominant to white flowers. If two heterozygous parents are crossed, what percentage of the offspring would have purple flowers?

• 100%
• 25%
• 50%
• 75%