Identify descriptions as broad sense or narrow sense heritability in sexually reproducing, diploid populations.

Solutions

Expert Solution

If we consider the Phenotype variation in terms of heritability, it may be measured as:

1. Broad sense heritability- measured in terms of, phenotype variance due to total genetic variance.

H² = V_G/ V_P

V_{P =} V_G+ VE

Thus, measures environmental effects

1. Narrow sense heritability - measured in terms of, phenotype variance due to additive factors, or variation due to effects on genes that is transmitted among generations-

h² = V_A/ V_P or h² = VA/ V_A + V_D + V_I

Thus, measures additive effect, dominance and epistatic effects.

This help in measuring the relation to offspring (as dominance and epistatic interaction is measured).

Effect of environment help to establish evolutionary effects by natural selection.

Thus, the genetic constitution of each parent is different, originating from maternal and paternal lineages. 50% of genes come from father and 50% from mother, which are further influenced by their genetic lineages. The inheritance may also be affected as autosomal or sex-linked modes, as X and Y chromosomes will have different genotypic effect.

Also there is environmental effect on genes which vary according to its effect on genes of the offspring.

Broad sense	Narrow sense
The proportion of phenotypic variance due to total genetic variance	the proportion of phenotypic variance due to only the additive effect
is a useful method to measure genetic versus environmental effects on phenotypic variance	includes genetic variance due to epistasis, dominance, and additive effects
can be used to predict evolution through natural selection	describes how closely offspring resemble their parents

gladiator answered 1 year ago

Next > < Previous

Related Solutions

In diploid, sexually reproducing populations, for which type of heritability (narrow-sense heritability or broad-sense heritability) does...

In diploid, sexually reproducing populations, for which type of heritability (narrow-sense heritability or broad-sense heritability) does selection have the most relevant and predictable action? Why?

true or false: 1)Narrow sense and broad sense heritability are equal when there is no dominance...

true or false: 1)Narrow sense and broad sense heritability are equal when there is no dominance and no epistasis 2) Broad sense heritability and repeatability are the same when there are no temporary environmental effects 3) Narrow sense heritability and repeatability are always the same when there are no non-additive genetic effects 4) Narrow sense heritability can be used as the regression coefficient to predict phenotypic value from breeding value

Explain the advantages and disadvantages of populations of sexually reproducing organisms over populations of asexually reproducing...

Explain the advantages and disadvantages of populations of sexually reproducing organisms over populations of asexually reproducing organisms. Also, include the following in your original post: • Address this from a molecular perspective as well as from a larger, environmental perspective. • Describe the two events that are common to all sexually reproducing organisms and how they fit into the different life cycles of those organisms. • Highlight three specific examples of reproduction from your text.

what does it mean when the narrow sense heritability is 2.7

A. Choose the word that makes this sentence correct: The higher/lower the narrow-sense heritability of a...

A. Choose the word that makes this sentence correct: The higher/lower the narrow-sense heritability of a trait, the faster you would expect that trait to respond to selection. B. Explain your answer from part A. Identify the equation you could use to predict the response of a trait to selection (1 pt.). Describe mathematically how changing the narrow-sense heritability would lead to the outcome you identified in part A

What are the three addítional sources of genetic variation within sexually reproducing populations?

What are the three addítional sources of genetic variation within sexually reproducing populations? Briefly describe how each contributes to genetic variation?

Meiosis is the process of diploid germ cell division to produce haploid gametes in sexually reproducing organisms.

Meiosis is the process of diploid germ cell division to produce haploid gametes in sexually reproducing organisms. What aspect of chromosome behavior most clearly accounts for Mendel's law of segregation? What aspect of chromosome behavior most clearly accounts for Mendel's law of independent assortment? What other process greatly contributes to genetic diversity during meiosis, and at what stage of meiosis does this process occur?

A certain species of shrimp are sexually-reproducing, diploid organisms with 86 chromosomes per typical cell.

A certain species of shrimp are sexually-reproducing, diploid organisms with 86 chromosomes per typical cell. How many chromosomes would be in a cell from this species of shrimp that is: (In the interest of credit, please neatly show only the work pertaining to your final answer for each question in this area.) a) a triple nulisomic somatic cell? b) a single trisomic somatic cell? c) a double trisomic gamete?

If the narrow sense heritability of a trait is 0, what does this mean? Does this mean a trait is entirely determined by environment?

If the narrow sense heritability of a trait is 0, what does this mean? Does this mean a trait is entirely determined by environment? Explain all the contributions to total phenotypic variance.

Meiosis is an important source of genetic variation in sexually reproducing organisms. Identify the events in...

Meiosis is an important source of genetic variation in sexually reproducing organisms. Identify the events in meiosis that result in segregation and independent assortment and how these two mechanisms produce genetic variation in the next generation. Use the following terms in your response: genes; alleles; homologous chromosomes; non-homologous chromosomes.

Subjects