Genetics & Punnett Squares practice

which is heterozygous ?

• Tt

• TT

Which is homozygous ?

• Zz

• SS

the genetic makeup of an organism

• heterozygous

• punnet square

• genotype

In dogs, brown fur is dominant to white fur. A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?

• 100% BB

• 75% BB and 25%Bb

• 50 % BB and 50% Bb

• 50% Bb and 50% bb

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Genotype refers to the ...

• physical expression of the genes

• the possible combination of alleles in a gene

• whether an allele is dominant or recessive

• how an organism will appear

Tags

NGSS.HS-LS3-2

An offspring will receive how many alleles from each parent to determine a specific trait?

• one

• two

• three

• five

Tags

NGSS.HS-LS3-1

What is a phenotype

• The genetic make up (code)

• The physical trait

having two of the same genes for the trait (sometimes called purebred).

• homozygous

• hetrozygous

• protein

• chromosome

Tags

NGSS.HS-LS3-1

having two different genes for a trait (sometimes called hybrid).

• protein
• homozygous
• heterozygous
• genotype

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed? (Brown is dominant to blue)

• 0 %

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3