Age Pyramids
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- expanding
- declining
- stable
- first expanding and then declining
Representation of age pyramids for human population
From the picture above, identify the growth status of the population whether it is expanding, stable or declining
expanding
declining
none
stable
A population is said to be mature or stable when
It forms an age pyramid of urn shape
It forms an age pyramid of bell shape
It forms an age pyramid of triangle shape
It forms an age pyramid of irregular shape
Differentiate between Dominant and Recessive
- Stable population
- Expanding population
- Vanishing population
- Declining population
A chromosome which has centromere near the end is called
Metacentric
Sub-metacentric
Acrocentric
Telocentric
Why are hemophilia and color blindness found more in males than in females?
State whether true or false-Chromosomes other than the pair of sex chromosomes are called alleles.
- Allopolyploidy
- Monosomy
- Aneuploidy
- Polyploidy
- high percentage of old individuals
- high percentage of young individuals
- low percentage of young individuals
- a stable population
- It will first decline and then stabilise
- It will decline
- It will stabilise
- It will increase
Crossing over
Linkage
Qualitative inheritance
Gene interaction
(a) Represent diagrammatically three kinds of age-pyramids for human populations.
(b) How does an age pyramid for human population at a given point of time help the policy-makers in planning for the future? [5]
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1755831/original_28.a1.png)
- Declining population
- Expanding population
- Stable population
- Vanishing population
- Stable population
- Declining population
- Expanding population
- Rapidly expanding population
Sex- linked genetically inherited traits
a. Can appear both in males and females.
b. are found only in males
c. are found only in females
d. result from premarital sexual intercourse.
Bell–shaped polygonal pyramid indicates
High percentage of young individuals
Moderate percentage of young individuals
Low percentage of old individuals
Low percentage of young individuals
Representation of age pyramids for human population
From the picture above, identify the growth status of the population whether it is expanding, stable or declining
Expanding
Stable
Declining
None of these
If a girl is colour blind, what is the possibility that her father is also colour blind?
![](https://search-static.byjusweb.com/question-images/byjus/infinitestudent-images/ckeditor_assets/pictures/13285/content_58.png)
- 1.Expanding rapidly
2.Expanding slowly
3.Stable
4.Declining - 1.Declining
2.Stable
3.Expanding slowly
4.Expanding rapidly - 1.Stable
2.Declining
3.Expanding rapidly
4.Expanding slowly - 1.Expanding slowly
2.Expanding rapidly
3.Declining
4.Stable
- High percentage of young individuals
- Low percentage of young individuals
- High percentage of old individuals
- Low percentage of old individuals
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/28713/content_a7.png)
- Expanding populaiton
- Vanishing population
- Stable population
- Decline populaition
Bell–shaped polygonal pyramid indicates
High percentage of young individuals
Moderate percentage of young individuals
Low percentage of young individuals
Low percentage of old individuals
- Child, adult, old
- Child, reproductive, old
- Pre-reproductive, reproductive, post-reproductive
- Pre-adult, adult, post-adult
In India, human population has higher number of younger age group because of
Long life span and low birth rate
Short life span and high birth rate
Short life span and low birth rate
Birth rate is equal to death rate
- increase
- decrease
- stabilise
- show no change
- Declining
- Fluctuating
- Growing
- Undeterminable
![](https://search-static.byjusweb.com/question-images/byjus/_3d625e93eb7134f441af9b59bd27092f44587c2920160907-32518-1hvbfdp.png)
- no new individuals are formed
- death rate is zero
- the rate offormation and rate of death of individuals is the same
- the experiment stopped
- declining
- flactuating
- stable
- growing