Question

Offspring of heterozygous offspring

Answer 1

Answer:

See explanation

Explanation:

Say we have a binary trait on some aliens, BB-blue, Bb-Purple, and bb-red aliens, we can calculate how many of them will be blue, purple, and red.

Let's start with generation P, or parents.

Generation P mixer

                     B           B

b                 Bb          Bb

b                Bb           Bb

4/4 Purple (Bb) 0/4 red (bb), 0/4 blue (BB)

So from a red parent (bb) and a blue parent (BB) there is a 4/4 or 100% chance of purple (Bb) offspring.

All the babies have grown up, and now they're in generation F1.

Let's say two purple (Bb) aliens decide to have babies  

Generation F1 mixer

                   B              b

B               BB              Bb

b               Bb               bb

2/4 purple (Bb), 1/4 red (bb), and 1/4 blue (BB)

So from two heterozygotes, two purple, two Bb there is a:

50% chance of another heterozygote, purple (Bb) baby, 25% chance of a red (bb) baby, and a 25% chance of a blue baby (BB)

All these numbers will be the same no matter what the letter is, however this only works for simple punnet squares, and this likely doesn't cut it if this is an AP bio question.