Question

1. in dogs, floppy ears (f) are dominant over straight ears (f). a homozygous dominant floppy - eared dog is crossed with a heterozygous floppy - eared dog. what percentage of their puppies will be homozygous dominant?

Explanation:

Step1: Determine the genotypes of the parents

A homozygous dominant floppy - eared dog has the genotype \(FF\). A heterozygous floppy - eared dog has the genotype \(Ff\).

Step2: Set up the Punnett square

	\(F\)	\(F\)
\(f\)	\(Ff\)	\(Ff\)

Step3: Calculate the percentage of homozygous puppies

From the Punnett square, out of 4 possible genotypes (\(FF, FF, Ff, Ff\)), 2 are \(FF\) (homozygous dominant). The percentage is \(\frac{2}{4}\times100\% = 50\%\)

Answer:

50%