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

Tags

NGSS.HS-LS3-1

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%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Long tongues (T) are dominant to short tongues in green tree frogs.  What is the probability that two frogs that are heterozygous for long tongues could produce offspring with short tongues?

• 100%
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

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

• genotype
• allele
• hybrid
• trait

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A genotype is

• the listing of the alleles for the trait
• the physical appearance of the trait
• the separation of the chromosomes
• the letters seen on the outside of the Punnett square

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

• heterozygous
• homozygous

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Why is crossing over important?

• Increases the number of genes that can be inherited
• Increases genetic variation
• Decreases the occurrence of genetic diseases
• Decreases the number of genes that can be inherited

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

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

• dominant
• hybrid

Tags

NGSS.HS-LS3-1

This process produces four sex cells, each containing half the usual number of chromosomes.

• meiosis
• mitosis

This is an example of a ______________.

• phenotype
• genotype
• xenotype
• base pairs

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1