1 of 4 Items Item 1
Which statement is correct regarding a bottleneck event? (1 mark)
A bottleneck event permanently decreases the population of a species.
A bottleneck event increases the population of a species permanently.
A bottleneck event decreases the gene pool of a population. **********
A bottleneck event increases the gene pool of a population.
2. Why are the gene pools of small populations smaller than those of larger populations? (1 mark)
bottleneck events
lack of suitable companions
lack of advantageous traits
inbreeding*******^
3. A bottleneck reduces the bear population in an area by 80%. Which of these statements is correct? (1 mark)
Disadvantageous traits are less likely to be passed on.
Disadvantageous traits are more likely to be passed on.***********
The bear gene pool has temporarily shrunk.
The bear gene pool has temporarily increased.
4. There are three main species of reptiles on an island. Species A has a population of 400 individuals and a low level of genetic variation. Species B has a population of 300 individuals and a medium level of genetic variation. Species C has a population of 150 individuals and a high level of genetic variation. Select the correct order of probability of survival from smallest to largest for these populations. (1 mark)
Species B, Species C, Species A
Species A, Species B, Species C *********
Species C, Species A, Species B
Species A, Species C, Species B For those who have different questions for 3 & 4 here are all the answers:
1. Which statement is correct regarding a bottleneck event?
ANSWER: A bottleneck event decreases the gene pool of a population.
2. Why are the gene pools of small populations smaller than those of larger populations?
ANSWER: inbreeding
3. A bottleneck reduces the bear population in an area by 80%. Which statement is correct about the genetic heritage of bears?
ANSWER: It has temporarily decreased, so disadvantageous traits are more likely to be passed on.
4. What information helps scientists determine the probability of survival of a population?
ANSWER: the level of genetic variation in the population
this is 100% true 1. C – A bottleneck event decreases the gene pool of a population.
2. D – inbreeding
3. A – Disadvantageous traits are more likely to be passed on.
4. C – Species A, Species C, Species B
For Grade 7 – Quick Trait, Survival, and Breeding Check.
@Mary two of your answers are wrong, I think you know this question was asked 10 hours ago. I am posting these answers to help other kids with their homework. I suggest using my answers to verify your answers, not to cheat. I’m not suggesting cheating, but if you really need to, maybe to improve your grade, well… I can’t control you, but do it if you have to. Don’t get caught though. Good luck! @Helper thank you very much for those answers. I only used them to check my answers and luckily they were correct. I would recommend listening to Helper. Oofer Gang is 100% correct thanks to @Helper Helper who only got 2 correct and 2 wrong answers, oofer gang is probably the answer for most people. *Correct YES Oofer Gang is correct @Oofer Gang is 100% correct, Tysm. 1. A bottleneck event decreases the gene pool of a population.
2. inbreeding
3. It has temporarily diminished, so disadvantageous traits are more likely to be passed on.
4. the level of genetic variation in the population
Have an amazing day! A
VS
VS
A 1.C
2.D
3.B
4.C
good luck