Genetics

In guinea pigs Black fur (B) is dominant to white(b), cross Bb x bb and determine genotypic ratio for offspring

• 2:2

• 0:2:2

• 1:2:1

• 2:2:0

In guinea pigs Black fur (B) is dominant to white fur (b) cross a white guinea with a heterozygous one,what is the genotypic ratio?

• 2:2

• 1:2:1

• 0:2:2

• 2:0:2

In pea plants Tall stems (T)are dominant to short stems (t) cross a homozygous tall plant with a homozygous recessive plant, what is the phenotypic ratio

• 4:0

• 2:2:0

• 0:4

• 0:2:2

In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-3

How many alleles (letters) do each person carry for a trait?

• 1
• 2
• 3
• 4

How many alleles (letters) does a child get from each parent for each trait?

• 1
• 2
• 3
• 4

Dominant alleles are represented by a:

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

Aa, DD, bB, yy are all examples of

• genotypes
• phenotypes

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

• tt
• Tt
• Bb
• TT

AA and Aa always show up as

• dominant
• recessive