Which of the following crosses would always result in offspring that only display the dominant phenotype? tt x tt tt x tt tt x tt tt x tt both a and c

both A and C

Explanation:

To know whats happens with all the offspring and the probabilities you need to draw Punnett squares.

We will call T the dominant trait and t the recessive.

TT x tt = Tt Tt Tt Tt = 100% Tt

100% of the offspring will show the dominant allele.

Tt x Tt = TT Tt tT tt =25% TT 50% Tt 25% tt

Here, you have 25% chances that the offspring shows the recessive allele.

TT x TT = TT TT TT TT= 100% TT

100% of the offspring will show the dominant allele.

Tt x tt = Tt tt tt tt = 25% Tt 75% tt

Here, you have 75% chances that the offspring shows the recessive allele.

d. the weight of the book