Genetics Probabilities

An allele that is expressed only when there are two present is called 

• a testcross.
• the law of independent assortment.
• a monohybrid cross.
• recessive.

The study of biological inheritance patterns and variation in organisms is

• generous.
• generic.
• general ed.
• genetics.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A______________________is a characteristic that is inherited such as eye color.

• train
• gene
• trait
• allele

Tags

NGSS.HS-LS3-1

Monohybrid crosses are crosses that examine

• the inheritance of multiple traits.
• only two traits.
• no traits.
• only one specific trait.

When two alleles of a gene are the different, they are 

• heterozygous
• purebred.
• homozygous.
• traits.

When two alleles of a gene are the same, they are 

• heterozygous.
• gametogenesis.
• homozygous.
• polar bodies.

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

NGSS.HS-LS3-2

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-LS3-2

T - tall and t = short
In the punnett square below, what belongs in the missing square

• tt
• Tt
• Bb
• TT

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What are the possible genotypes for this cross?

• TT = 25% Tt= 50% tt=25%
• all tall
• TT= 75% tt = 25%
• Tt = 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2