Genetics

What is a phenotype?

• The expression of a trait; what you see.
• refers to the genetic makeup of an individual
• An organism that has the same genes for a trait (ex. TT or tt)
• the passing of traits from parent to offspring

Tags

NGSS.HS-LS3-3

What does heterozygous mean?

• An organism that has the same genes for a trait (TT or tt)
• An organism that has different genes for a trait (Tt)
• When neither gene is fully dominant; offspring is a mixture of both
• the different forms of a trait (hair color--> brown, blonde, red

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A heterozygous yellow pea plant's genotype would be:

• YY
• yy
• Yy
• Yg

Tags

NGSS.HS-LS3-1

A corn plant heterozygous for tall sprouts is crossed with a corn plant with short sprouts. If tall sprouts are dominant, how many different phenotypes are possible in the offspring?

• 1
• 2
• 3
• 4

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?

• 100% Tt
• 50% Tt, 50% tt
• 75%Tt, 25%tt
• 25%TT, 50%Tt, 25%tt

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

TT,tt,PP,pp,SS,ss are examples of alleles that are?

• homozygous
• heterozygous
• different
• homologous 

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The genetic makeup of an organism, such as RR, Tt, PP is its _____.

• phenotype
• dominance
• genotype
• trait

Tags

NGSS.MS-LS3-2

Heterozygous is when...

• the alleles are the same
• the alleles are different
• the alleles are absent
• the alleles are present

Tags

NGSS.HS-LS3-2

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

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

Tags

NGSS.HS-LS3-1

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

• Tt
• tt
• TT
• t

Tags

NGSS.HS-LS3-1