Ahomozygous type b woman marries a heterozygous type a man. show punnett square genotypes and phenotype

Phenotype is Type A: Type B

Genotype is 1:1

Explanation:

It is given that type B woman is homozygous.  

Thus the genotype of the woman can be BB or bb

The man is of type A and heterozygous.

Thus the genotype of the man is Bb

We see that when the genotype is heterozygous Bb then the gene expresses type A condition

So, when the alleles are in homozygous dominant condition then the gene BB will also express in type A condition.

But we know that the women is type B. So, the genotype of the women is bb.

Cross between bb X Bb is shown in the punnett square attached

Thus,

Phenotype is Type A: Type B

Genotype is 1:1

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite   shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.