<p>I am scoring around 660 on the Princeton Biology practice tests. Can anyone give me a rough estimate as to what I may score on the actual biology test, comparing the difficulty levels? Which one is generally agreed to be harder?</p>
<p>in chickens , the allel for long tail feathers (T) is dominant over the allel for for short tail feathers (t)
if pure breeding long tailed chicken (TT) mates with pure breeding short tailed chiken (tt),
what percentage of their offspring (if mated with correct genotype could give rise to chicken with short tails ??
A) 25%
B)50%
C)75 %
D)100%</p>
<p>100%
T T
t Tt Tt</p>
<p>t Tt Tt</p>
<p>excuse me if the formatting gets messed up after i post this (it totally looks good now… haha) but this means that all of the offspring have a recessive gene, which means that, when “mated with the correct genotype” (either Tt or tt) they have potential to have offspring with short tails</p>