The colour of a mouses fir is determined by a single gene. different versions of a gene are known as alleles.

explain how a gene codes for a characteristic

The colour of a mouses fir is determined by a single gene. different versions of a gene are known as alleles.

Explain how a gene codes for a characteristic?

From the assertion above, every genotype is made up of a pair of allele which one is donated from a parent to form a genotype. The dominant gene determines the characteristics that the offspring would exude.

Explanation:

if parent A donates an allele T and parent B donates an allele t, both parents now has Tt has a pair of allele but the ones from parent A dominates which is T over t, then such offspring exudes tallness which is a gene inherited from one of the parents

not sure but try c two haploid cells

explanation:

i'd say that the moon rock is about 2.2 billion years old.