Question

in seals, long whiskers (w) is dominant to short whiskers (w). a homozygous dominant seal is crossed with a homozygous recessive seal
question
what percentage of the offspring will be homozygous dominant?
what percentage of the offspring will be heterozygous?
what percentage of the offspring will be homozygous recessive?
what percentage of the offspring will have long whiskers?
what percentage of the offspring will have short whiskers?

Explanation:

Step1: Identify parent genotypes

Homozygous dominant seal: $WW$; Homozygous recessive seal: $ww$

Step2: Set up Punnett Square

	$W$	$W$
$w$	$Ww$	$Ww$

Step3: Calculate genotype percentages

All 4 offspring are $Ww$.

• Homozygous dominant ($WW$): $\frac{0}{4} \times 100\% = 0\%$
• Heterozygous ($Ww$): $\frac{4}{4} \times 100\% = 100\%$
• Homozygous recessive ($ww$): $\frac{0}{4} \times 100\% = 0\%$

Step4: Calculate phenotype percentages

Long whiskers ($W_-$) includes $WW$ and $Ww$: $100\%$
Short whiskers ($ww$): $0\%$

Answer:

1. 0%
2. 100%
3. 0%
4. 100%
5. 0%