Activity 4 A The cells in your body receive half their chrom

Activity 4

A. The cells in your body receive half their chromosomes from your father and one half of their chromosomes from your mother. So for each pair of homologous chromosomes one will be a maternal chromosome and one will be a paternal chromosome.. During meiosis when the haploid gametes are formed, each member of the pair but not both ends up in a gamete. This is the principle of segregation.1. For humans (N =23) how many possible combinations of maternal and paternal chromosomes are there? Show your reasoning.

B, How many of the combinations from part A involve 10 maternal chromosomes and 13 paternal chromosomes? Hint are we dealing with an ordered or unordered event here?

Activity 5

Recall that DNA is made from a sequence of four nucleotides that differ in terms of which nitrogen base A,T,G,C is present in each nucleotide. Suppose you have a region of DNA which is 100 nucleotides long. How many possible nucleotide sequences are there for this region of DNA?

Solution

ACTIVITY 5

THERE IS DNA WHICH IS 100 NUCLEOTIDES LONG

WHICH MEANS IT CAN FILL UPTO 100 SPACES

HENCE THE POSSIBLE NUCLEOTIDE SEQUENCE ARE THERE FOR THIS REGION = 100!(100 FACTORIAL)