2 years ago

Corals use harpoon-like to catch food

1 answer:

6 1

Like a harpoon, the barbs shoot out .Corals are sessile , meaning they cannot move to get food.

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If a parent with AB blood and a parent with

Vlad1618 [11]

Answer:

O blood is a recessive trait, so none of the children will have O blood. The genes for either type A or Type B will be determined by the egg/sperm being fertilized with the reproductive cell of the other parent. the probability of receiving either of the gene versions is 1/2, so half of the children will have A blood and the other half will have B blood

4 0

2 years ago

Phenylketonuria, PKU, is a single-gene recessive human

astraxan [27]

Answer:

1/2

Explanation:

Let's assume that the allele "p" is responsible for PKU in the homozygous state. According to the given information, both the parents are unaffected by the disorder but have an affected child. This means that both the parents carry at least one copy of the recessive allele responsible for the disease. Therefore, the genotype of each of the parents is Pp. A cross between Pp and Pp would produce progeny in following ratio=

Pp x Pp = 1/4 PP: 1/2/ Pp: 1/4 pp

Therefore, the probability that their next child will carry just one recessive allele is 1/2.