Genetics Review

In the punnett square shown, what must the genotype of the missing parent be?

• BB
• Bb
• bb
• Tt

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Having two of the SAME alleles for a trait (example HH or hh):

• homozygous
• heterozygous
• recessive
• dominant

Recessive alleles may not be expressed because they are

• masked by the dominant allele
• the least common allele in the population
• the most common allele in the population
• less likely to having crossing over

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

Dominant alleles are represented by a:

• Male gene
• lowercase letter
• recessive trait
• capital letter

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

bb crossed with BB, what is the probability of Bb?

• 0%
• 25%
• 50%
• 100%

Tags

NGSS.HS-LS3-3

An organism's appearance or other observable characteristics:

• phentoype
• genotype
• recessive
• dominant

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous
• BB

Tags

NGSS.HS-LS4-4

If green is dominant over purple, then what is the genotype for this individual?

• Purple
• Green
• GG
• gg

Tags

NGSS.HS-LS3-1