A grey (G) male rabbit was mated with an albino (g) female rabbit. The F1 generation was grey. Show the phenotypic ratio of their offspring if an F1 male was mated with an albino female.

Since pink flowers result from a cross that also produces red and white flowers, this indicates incomplete dominance where pink is the heterozygous phenotype.

• Red phenotype: $RR$
• White phenotype: $WW$
• Pink phenotype: $RW$

Parents are two pink flowering plants.

Gametes from first $RW$: $R, W$
Gametes from second $RW$: $R, W$

• Genotypes: $25\% RR$, $50\% RW$, $25\% WW$
• Phenotypes: $25\%$ Red, $50\%$ Pink, $25\%$ White
• Phenotypic ratio: $\boxed{\text{1 Red : 2 Pink : 1 White}}$

3. A blue fly (BB) is crossed with a yellow fly (YY). All of the offspring produced are green (BY).

Parents: Blue fly ($BB$) $\times$ Yellow fly ($YY$)

Gametes from $BB$: $B$
Gametes from $YY$: $Y$

• Genotypes (F1): All $BY$ ($100\%$)
• Phenotypes (F1): All Green ($100\%$)
• Genotypic ratio: $\boxed{\text{1 BY}}$
• Phenotypic ratio: $\boxed{\text{1 Green}}$

Parents: Green fly ($BY$) $\times$ Green fly ($BY$)

Gametes from first $BY$: $B, Y$
Gametes from second $BY$: $B, Y$

• Genotypes (F2): $25\% BB$, $50\% BY$, $25\% YY$
• Genotypic ratio: $\boxed{\text{1 BB : 2 BY : 1 YY}}$
• Phenotypes (F2): $25\%$ Blue, $50\%$ Green, $25\%$ Yellow
• Phenotypic ratio: $\boxed{\text{1 Blue : 2 Green : 1 Yellow}}$

Parents: White fur male ($WW$) $\times$ Black fur female ($BB$)

Gametes from $WW$: $W$
Gametes from $BB$: $B$

• Genotypes (F1): All $BW$ ($100\%$)
• Phenotypes (F1): All Black and white fur ($100\%$)
• Genotypic ratio: $\boxed{\text{1 BW}}$
• Phenotypic ratio: $\boxed{\text{1 Black and white fur}}$