Explain the effect of cumulative genes on ski | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) According to Davenport,human skin color is determined by polygenic inheritance. In polygenic traits,the phenotype is determined by the cumulative

Vedclass · Accepted Answer

It is an example of polygenic inheritance where each allele contributes to the phenotype.

Vedclass · Answer

(B) According to Davenport,human skin color is determined by polygenic inheritance. In polygenic traits,the phenotype is determined by the cumulative effect of each allele.Let us assume that three genes $A, B,$ and $C$ control skin color. The dominant alleles $A, B,$ and $C$ are responsible for dark skin pigmentation,while the recessive alleles $a, b,$ and $c$ are responsible for light skin pigmentation.$A$ genotype with all dominant alleles $(AABBCC)$ results in the darkest skin color. Conversely,a genotype with all recessive alleles $(aabbcc)$ results in the lightest skin color. Each dominant allele adds a unit of pigment,demonstrating the cumulative effect.

Explain the effect of cumulative genes on skin color.

Similar Questions

In a case of polygenic inheritance,a trait is controlled by $3$ pairs of genes. If an individual is heterozygous for all $3$ alleles,what will be the phenotypic ratio produced by self-crossing?

The kernel color of wheat is determined by three pairs of polygenes. In a cross between $AABBCC$ (dark color) and $aabbcc$ (light color),what will be the proportion of $F_2$ progeny having a kernel color similar to either of the two parents?

In a polygenic trait,an individual with three recessive alleles expresses $50 \%$ of the trait,while an individual with three dominant alleles expresses $80 \%$ of the trait. What is the contribution of each dominant allele to the trait (in $\%$)?

Which of the following traits in humans is controlled by the combined effect of more than one gene?

Inheritance of skin colour in humans is an example of

Vedclass Test Series

Exam Paper Generator

Online Exam Module