Question

name: komarcus harris
punnett square practice
all about dogs
complete the punnett squares about dogs below. be sure to pay
attention to your capital and lowercase letters for dominant and
recessive traits.

1. black fur (b) is dominant to

yellow fur (b). a heterozygous dad
and a homozygous dominant mom
have offspring. complete the
punnett square to show the
combinations of allele the
offspring can have.
a. what percentage of the dogs
will be homozygous recessive?

1. a solid coat (s) is

dominant to a patterned
coat (s). cross a
homozygous dominant
mom and a homozygous
recessive dad.
a. what percentage of the dogs will
have a solid coat?

1. in dogs, short hair (h) is

dominant to long hair (h). complete
the punnett square to show
the combinations a
heterozygous mom and
a heterozygous dad create.
a. what percentage of the dogs
will have long hair?

1. mack the yellow lab has a pink

nose. a dark nose (n) is dominant to a
pink nose (n) his mom had a pair of
homozygous recessive alleles, and his
dad had a pair of homozygous
recessive alleles. complete the cross
to see how mack got
a pink nose.
a. what percentage of the
dogs got a pink nose?

1. straight ears (f) are dominant to floppy ears

(f). cross a homozygous recessive mom with a
heterozygous dad.
a. what percentage
of the dogs will be
heterozygous?

Explanation:

Step1: Determine parents' genotypes

Mom is homozygous recessive for nose color: \( nn \). Dad is homozygous recessive for nose color: \( nn \).

Step2: Create Punnett square

	\( n \)	\( n \)
\( n \)	\( nn \)	\( nn \)

Step3: Calculate percentage

All offspring have genotype \( nn \). So the percentage of dogs with pink nose (since \( nn \) shows recessive pink - nose trait) is calculated as \(\frac{4}{4}\times100\% = 100\%\)

Answer:

100%