SS and In catde , the allele for short horns (S) is dominant over the allele for long horns (s)TWO short horn cows are bred and produce four offspringThree have short horns and one has long hornsWhat are the most likely genotypes of the parents? A. SS and ss
B. Ss and ss
C. SS and Ss
D. Ss and Ss

Why is C the wrong answer and which one is the correct answer

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation: