Mono & Dihybrid Crosses

the genetic makeup of an organism

• heterozygous
• punnet square
• genotype

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Genotype refers to the ...

• physical expression of the genes
• the possible combination of alleles in a gene
• whether an allele is dominant or recessive
• how an organism will appear

Tags

NGSS.HS-LS3-1

A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?

• 100% BB
• 75% BB and 25%Bb
• 50 % BB and 50% Bb
• 50% Bb and 50% bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

having two of the same genes for the trait (sometimes called purebred).

• homozygous
• hetrozygous
• protein
• chromosome

Tags

NGSS.HS-LS3-1

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

An allele whose trait only shows up when no dominant allele is present.

• hidden allele
• dominant allele
• recessive allele
• present allele

What gamete possibilities could come from the parent's genotype: AaBB

• AB, AB, aB, aB

• Ab, AB, Ab, ab

• Ab, Ab, Ab, Ab

• AB, Ab, aB, ab

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

How many alleles do we get from each parent for each trait?

• one
• two
• three
• four

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A male beetle has the genotype Ttbb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype TtBb?

• 3/16
• 4/16
• 8/16
• 12/16

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What are the possible genotypes for this cross: Tt x Tt

• TT = 25% Tt= 50% tt=25%

• all tall

• TT= 75% tt = 25%

• Tt = 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3