In humans, not having freckles (f) is dominant to having freckles (f). not having a cleft chin (c) is also dominant to having a cleft chin (c). which statement is true of the offspring of a cross between parents that are both heterozygous for both traits (ffcc)?

Punnet Square
 
        F       f
              
C     FC      Cf

c       Fc      cf

25% is homozygous recessive for having a cleft chin and freckles
25% is homozygous dominant for not having a cleft chin or freckles
25% is heterozygous dominant for having freckles and not having a cleft chin
25% is heterozygous dominant for having a cleft chin and for not having freckles

Hope this helps!

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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.