Guinea pigs can have curly or straight hair, where the curly gene is recessive (

Question

Guinea pigs can have curly or straight hair, where the curly gene is recessive (c). Guinea pigs can also have a condition called bowlegged, where their legs curve noticeably outward. Bowleggedness is a dominant lethal allele if an individual inherits two copies of it. It is a cross between a curly haired, bowlegged guinea pig and a heterozygous straight haired pig that is also bowlegged. Determine the genotypic and phenotypic ratios. How many of their offspring would you expect to be normal with curly hair? 3/8 1/6 1/8 0

Explanation / Answer

Parents hhBb X HhBb

Gametes hb,hb and HB,Hb,hb,hb

Fertilization

Answer : 1/6 curly , normal

hb hB HB HhBb(straight,bowleg) HbBB(straight, bowleg) dies BB lethal Hb Hhbb(straight, normal) HhbB(straight, bowleg) hB hhBb(curly, bowleg) hhBB(curly, bowleg) dies as lethal hb hhbb(curly, normal) hhBb ( curly, bowleg)

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