Punnett Squares + vocab

A gene carried on a normal body chromosome is called _____________ and one carried on the x chromosome is called ____________

• homozygous; heterozygous

• dominant; recessive

• autosomal; sex linked

• heterozygous; homozygous

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.HS-LS3-1

NGSS.HS-LS3-2

What is a phenotype?

• The expression of a trait; physical appearance.
• 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

R=round seed
r=wrinkled seed.
Cross a homozygous round with a wrinkled. Which statement predicts the results?

• offspring will be Rr
• offspring will be RR
• round seeds will be recessive to wrinkled
• Wrinkled will be observed in half of offspring

Tags

NGSS.HS-LS3-2

If Patrick is a homozygous dominant for tall head, and marries Patty, who in homozygous recessive for short head, then their children would have the genotype of...

• TT
• tt
• Tt

Tags

NGSS.HS-LS3-1

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

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

Having two different alleles for a trait (example Hh):

• homozygous
• heterozygous
• dominant
• purebred

In pea plants, round seeds are dominant to wrinkled and green is dominant to yellow.
A pea plant heterozygous for round, green seeds is crossed with a pea plant that is homozygous for wrinkled, yellow seeds.  What fraction of the offspring will express BOTH dominant traits?

• 1/2
• 9/16
• 3/16
• 1/4

In pea plants, round seeds are dominant to wrinkled and green is dominant to yellow.
A pea plant with a dominant phenotype is crossed with a plant that is homozygous recessive for both traits.  If the dominant phenotype parent is Homozygous dominant for both traits, what would the genotype of the offspring be?

• all offspring would be RRYY
• all offspring would be RrYy
• 1/2 the offspring would be RRYY and the other half RrYy
• there would be four different genotypes possible in the offspring

Tags

NGSS.HS-LS3-1

Dimples and freckles are both dominant traits in humans. If two parents are heterozygous for dimples and freckles, what is the chance of them having an offspring with no dimples and no freckles?

• 1/4

• 1/16

• 0

• 9/16

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3