Which sequence is complementary to the DNA sequence of CGTAGACAT?

CGTAGACAT?

GCATCTGTA

Explanation:

a helpful mnemonic for pairing DNA with their corresponding sequence is Apple in Tree, Car in Garage

a. 1/4

b. 0

c. 9/16

Explanation:

Genotype of the parents: AaBBccDd and AabbCCDd.

Aa x Aa= 1/4 AA: 1/2 Aa: 1/4 aa

BB x bb= All Bb

cc X CC= All Cc

Dd x Dd= 1/4 DD: 1/2 Dd: 1/4 dd

a) The probability of the progeny heterozygous at all loci= 1/2 Aa x 1 Bb x 1 Cc x 1/2 Dd = 1/4.

b) The probability of an offspring that is homozygous at all four loci= 0

Since the progeny will be heterozygous for B and C. None of the progeny can be homozygous at these two loci.  

c.  

Aa x Aa= 3/4 dominant: 1/4 recessive

BB x bb= All dominant

cc X CC= All dominant

Dd x Dd=  3/4 dominant: 1/4 recessive

The probability of dominant offspring= 3/4 x 3/4 = 9/16