Feather color in budgies is determined by two different gene…

Feather color in budgies is determined by two different genes, Y and B, one for pigment on the outside and one for the inside of the feather. YYBB, YyBB, or YYBb is green; yyBB or yyBb is blue; YYbb or Yybb is yellow; and yybb is white.   A blue budgie is crossed with a white budgie. Which of the following results are NOT possible?

Consider the following diagram of a replication bubble. Soli…

Consider the following diagram of a replication bubble. Solid lines represent parental DNA strands; dotted lines represent newly-forming daughter strands.  One of the leading strands has been labeled for you. Use this information to answer the next two questions.