Question

In a population of lizards, allele T (TT and Tt) codes for long tails. The frequency of allele t (tt) which codes for short tails is 60%. In this population, it was found that having a longer tail tricked the predators into thinking it was a snake and scared them away, which of the following is most likely to occur over time.

Question 20 options:

the frequency of the two alleles will change until they both equal 50%


there will be no change in frequency since T is dominant


the frequency of T will decrease since it is dominant


the frequency of T will increase, and t will decrease

Answer 1

The frequency of T will decrease since it is dominant

Step-by-step explanation:

Since having a long tail provides a survival advantage, individuals with the T allele are more likely to survive and reproduce, passing on their T allele to their offspring. As a result, over time, the frequency of the T allele is likely to increase, and the frequency of the t allele will decrease.

The fact that T is dominant does not affect the frequency of the two alleles in the population, but it does determine the physical expression of the trait in individuals that have at least one T allele.