2. Let's estimate the probability of two children having identical genomes and not be twins. Assume that there are no crossovers. b. How many different gamete chromosomal arrangements {or possibilities] can there be between two parents? Assuming each arrangement is equally likely, what's the probability of each arrangement? There were roughly 130 million births last year. Let's assume [albeit unrealistically} that all 130 million were born to 13B million different families that all already had one child. Compute the probability of there being at least 1 family where the 2 children had identical genomes