In foxes, silver coat (r) is recessive to red coat (R). Two foxes are mated. One of the parent foxes has a red coat and one has a silver coat. The litter that results contains four red-coat and three silver-coat kits.
(a) What is the genotype of the red-coat parent?
(b) What is the genotype of the silver-coat parent?
(c) What are the genotypes of the offspring?
(d) Did segregation of alleles occur?
(e) Did independent assortment of alleles occur?

Explanation:

A homozygous fox would have either two dominant alleles (RR) or two recessive alleles (rr).  

A heterozygous fox would have a mix of both one dominant allele and one recessive allele (Rr).

However, a heterozygous fox can only be red, as the (Rr) combination will make it so that the dominant red coat trait will rule over the recessive allele.

(a).  as given that f 1 generation are 4 red and 3 white , so RED coat can not be homozygous dominant , So red coat will be Rr (heterozygous dominant).

(b). silver coat is recessive homozygous , rr

(c).  genotypes of offspring  Rr, Rr, rr, rr.

(d) yes

(e) yes

i was thinking 4.0 v hope this

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.