Genetics and Heredity Test 2

In a Punnett square, a lower case letter stands for a ____________ allele.

• dominant

• recessive

• homozygous

• heterozygous

Hair color, height, eye color and freckles are examples of human traits. What do we call the physical expression of the genetic material of an organism?

• genetics

• heredity

• genotype

• phenotype

In animals, shaggy fur is dominant to short fur. The Punnett Square shows the genotypes of the offspring of a shaggy fur animal and a short fur animal. What were the genotypes of the parents?

• FF and FF

• Ff and ff

• ff and ff

• Ff and Ff

In animals, shaggy fur is dominant to short fur. According to the genotypes shown, what percent of offspring will have short fur?

• 0

• 25

• 50

• 75

• 100

In a punnet square where are the parent alleles written?

• Top and inside the boxes
• Only on the left and right side of the boxes. 
• outside of the boxes (top and left side)
• All on the top side of the boxes

Heterozygous is when...

• the alleles are the same.

• the alleles are different.

• the alleles are absent.

• the alleles are present.

T = tall and t = short

In the punnett square shown, what belongs in the missing square

• tt

• Tt

• Bb

• TT

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive

• dominant

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

• Tt
• tt
• TT
• t

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

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