3 years ago

Embryonic stem cells are

1 answer:

6 0

Embryonic stem cells (ES cells or ESCs) are pluripotent stem cells derived from the inner cell mass of a blastocyst, an early-stage pre-implantation embryo. Human embryos reach the blastocyst stage 4–5 days post fertilization, at which time they consist of 50–150 cells. Hope I’ve helped ;)

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A person who has type AB blood and is heterozygous for Rh factor has children with a person who is heterozygous for type A blood

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Blood type is determined by the alleles coding for the antigen present on cell membranes.

The person with type AB blood has a heterozygous Rh factor.

Half the gametes have Rh factor (+) and the other half are negative for Rh factor (-)
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The possible gamete combinations are IA+, IA-, IB+, IB-

The person with heterozygous type A blood is negative for Rh factor