7. white wool (ww, ww) and brown eyes (bb, bb) are dominant traits in sheep, while black wool (ww) and blue eyes (bb) are recessive. determine the results of a cross between a sheep with black wool and brown eyes (bb) and a sheep with white wool (ww) and blue eyes.

1/2 wWBb , White wool and brown eyes.

1/2 wWbb , White wool and blue eyes.

Explanation:

White wool (W) is dominant over black wool (w).

Brown eyes (B) is dominant over blue eyes (b).

A sheep with black wool (ww) and brown eyes (Bb) is crossed with a sheep with white wool (WW) and blue eyes (bb).

If there is independent assortment between genes, the genotypes of the first parent's gametes will be wB and wb. The gametes of the second parent can only be Wb.

The resulting offspring will be:

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step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.