The probability that an offspring would have triangular eyes can be determined by looking at the Punnett square for the cross between two extraterrestrials with genotypes TT (triangular) and Tt (triangular).
The Punnett square would look like this:
| T | t |
-----------------------------
T | TT | Tt |
-----------------------------
T | TT | Tt |
-----------------------------
Out of the four possible offspring, three have the genotype for triangular eyes (TT or Tt). Therefore, the probability that an offspring would have triangular eyes is 3:4.
The correct answer is (d) 3:4.
An extraterrestrial planet has organisms that reproduce with DNA the same way as organisms on Earth. A common organism dwelling on this planet have eyes that are either triangular or round. Triangular eyes (T) are dominant to round eyes (t). A Punnett square should be made to predict the offspring of two of these extraterrestrials with the genotypes TT and Tt.
What is the probability that an offspring would have triangular eyes?
a
0:4
b
1:4
c
2:4
d
3:4
e
4:4
6 answers
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