Question

What would be the expected frequency of dewlap extensions a pushups in males while in the presence of females and a predator vs versus. in the presence of a female alone?

A) Higher frequency for dewlap extension and lower frequency for pushups
B) Lower frequency for both dewlap extension and pushups.
C) Higher frequency for both dewlap extension and pushups
D) Lower frequency of dewlap extension and higher frequency for pushups

Answer 1

The frequency of dewlap extensions is expected to be lower and pushups higher in the presence of both a female and a predator due to the need to balance courtship and predator avoidance. X-linked recessive traits are more frequently observed in males, a recombination frequency of 0 indicates perfect linkage, and a frequency of 0.5 shows independent assortment.

Step-by-step explanation:

The expected frequency of dewlap extensions and pushups in males while in the presence of females and a predator versus in the presence of a female alone would likely differ based on the context of the situation. In the presence of a predator, it is reasonable to expect that the males might suppress typical courtship behaviors like dewlap extensions to avoid attracting attention, thus resulting in a lower frequency of dewlap extension. However, pushups might be used more frequently in a defensive or territorial display to discourage predators. Therefore, the answer could be D) Lower frequency of dewlap extension and higher frequency for pushups. This context-based behavior allows the individual to balance the needs of reproduction with survival.

Review question specifics:

1. X-linked recessive traits are observed more frequently in males than in females because males have only one X chromosome, thus any recessive trait present on that X chromosome will be expressed, while females have two X chromosomes and a recessive trait would have to be present on both to be expressed.
2. A recombination frequency of 0 corresponds to perfect linkage and violates the law of independent assortment, indicating that two genes are so close together on a chromosome that they do not get separated by recombination.
3. A recombination frequency of 0.5 corresponds to independent assortment and the absence of linkage, which means that the genes assort independently of each other, as they are on different chromosomes or far apart on the same chromosome.

Answer 2

B

Step-by-step explanation:

The correct answer is option B

B) Lower frequency for both dewlap extension and push ups.

After a predatory attack, both dewlap extension and pushup decreases whereas during mating with the female both dewlap extension and pushup tend to increase. So, from the above comparison we can say that expected frequency of dewlap extensions a pushups in males while in the presence of females and a predator decreases.