All categories

1 year ago

Why is the replacement level fertility 2.1 instead of 2?

1 answer:

4 0

The replacement fertility rate (TFR) in developed countries 2.1 and not 2.0 because "some people get married more than once" (Option B)

<h3>What is Replacement Fertility Level?</h3>

The degree of fertility of a woman when she propagates exactly enough girls to replace her in the following generation is referred to as replacement level fertility. It is known as the NRR (Net reproduction rate), and it exclusively counts daughters or female children.

TFR is also used as a measure of replacement-level fertility. It is the average number of offspring required to replace both parents in the next generation. A TFR of 2.1 is considered replacement level fertility in industrialized nations. TFR at the replacement level must be more than 2.0. If TFR is 2.0, which is two children per couple, can you anticipate all female offspring to survive until they reach childbearing age? No, TFR must be more than 2.0.

Furthermore, the sex ratio at birth has consistently favored boys, with 105 boys born for every 100 females. After accounting for all of these variables, the replacement level of fertility is 2.1.

Learn more about Replacement Fertility Level:

brainly.com/question/18969093

#SPJ1

Full Question:

Why is the replacement fertility rate in developed countries 2.1 and not 2.0?

You might be interested in

Child 2 is polydactylous, otherwise normal; Child 4 has cystic fibrosis and is polydactylous.What is the genotype of the mother?

satela [25.4K]

Answer:

PpCc; ccpp; ccPp; 1/2

Explanation: The complete correct question is as follows

A polydactylous woman, otherwise normal, marries a healthy normal man. Their four children have the following phenotypes:

Child 1 is normal in all respects; Child 3 has cystic fibrosis, otherwise normal Child 2 is polydactylous, otherwise normal; Child 4 has cystic fibrosis and is polydactylous. A. What is the genotype of the mother? B. What is the genotype of child 3? C. What is the genotype of child 4? D. What is the chance that child 1 is heterozygous for cystic fibrosis?

We represent the traits of the parents with the following

P= Polydactyly

p=normal

C= normal

c= abnormal (cystic fibrosis

A. What is the genotype of the mother

Mother PpCc (polydactylous)

Father: ppCc (healthy normal)

B. What is the genotype of child 3?

Applying the mendel's cross link between the mother's genotype and father's genotype,

PpCc × ppCc

Child 3 will be ccpp (abnormal with cystic fibrosis)

C. What is the genotype of child 4?

Applying the mendel's cross link between the mother's genotype and father's genotype,

PpCc × ppCc

Child 4 will be ccPp

D. What is the chance that child 1 is heterozygous for cystic fibrosis?

Applying the mendel's cross link between the mother's genotype and father's genotype,

PpCc × ppCc

Child will be Cccc

The chance is 1/2

8 0

3 years ago

Which living this is a typical marsh inhabitant?

Crazy boy [7]

I'd say it should be D. Peat. Hope this helps! =^-^=

4 0

3 years ago

Read 2 more answers

Mrs. Smith has blood type A. Her father has blood type A, and her mother has blood type B. If Mr. Smith has blood type AB, what

Elodia [21]

according to the punnet , A is correct I think

3 0

4 years ago

Most of the water vaper and carbon dioxide in earths atmosphere is found

8_murik_8 [283]

Much of the water vapor and carbon dioxide in earth’s atmosphere is found in the troposphere.

5 0

3 years ago

5 and 6 please.. thank you

Sliva [168]

5. Because of rain and oxygen, if a set of tools is left outdoors in the rain for a long time, it will rust.
6. Yes, I believe it is possible for any of the earth materials scenes to be affected by both mechanical and Chemical weathering, but I am more positive about #5.

6 0

3 years ago