crossing a plant with white flowers and a plant with red flowers produces pink flowers in the offspring. what is this process called?

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If a red flowered plant is crossed with a white flowered plant,and pink flowers result,this shows ____ ?

Incomplete Dominance Incomplete dominance is an example of a non-mendelian trait (doesn't follow the genetic rules established by Gregor Mendel). When two parents mate and produce offspring, the offspring is a blend of the two parents. So, a red flower and a white flower would make a pink flower.

If a red flowered plant is crossed with a white flowered plant,and pink flowers result,this shows __________ ?

Biology

1 Answer

Maddie May Apr 26, 2018

Incomplete Dominance

Explanation:

Incomplete dominance is an example of a non-mendelian trait (doesn't follow the genetic rules established by Gregor Mendel). When two parents mate and produce offspring, the offspring is a blend of the two parents. So, a red flower and a white flower would make a pink flower.

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The crossing of a red flowered plant and a white flowered plant, produces all the offspring with pink flowers. This cross illustrates

Click here👆to get an answer to your question ✍️ The crossing of a red flowered plant and a white flowered plant, produces all the offspring with pink flowers. This cross illustrates

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The crossing of a red flowered plant and a white flowered plant, produces all the offspring with pink flowers. This cross illustrates

Red is dominant

White is dominant

Pink is dominant

Red and white exhibit incomplete dominance

Red and white exhibit codominance.

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Understanding Codominance and Incomplete Dominance

Free practice questions for High School Biology - Understanding Codominance and Incomplete Dominance. Includes full solutions and score reporting.

High School Biology : Understanding Codominance and Incomplete Dominance

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High School Biology Help » Genetics and Evolution » Genetics Principles » Inheritance Patterns » Understanding Codominance and Incomplete Dominance

Example Question #1 : Understanding Codominance And Incomplete Dominance

A plant with red flowers is crossed with a plant with white flowers. The resulting offspring have pink flowers. What term describes the dominance of this trait?

Codominance

Incomplete dominance

Dominance Recessiveness

Incomplete dominance

Explanation:

A phenotypic "blending" of two traits is referred to as incomplete dominance, indicating that neither trait is truly dominant over the other. Instead of one color overpowering expression of the other, both colors are expressed simultaneously.

Codominance suggests that both phenotypes are dominant, but cannot be expressed at the same time. The result of codominance would be regions of dominant red expression and regions of dominant white expression, resulting in spots rather than blending.

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Example Question #1 : Understanding Codominance And Incomplete Dominance

Two pure breeding plants are crossed. One plant has red flowers and the other has white flowers.

What phenotype(s) would be seen in the first generation if flower color exhibited incomplete dominance?

All offspring would have both red and white flowers

Half of the offspring would have red flowers, and half would have pink

All offspring would have pink flowers

Half of the offspring would have red flowers, and half would have white

All offspring would have pink flowers

Explanation:

The genotypes of the offspring can be determined by crossing the red flowers, RR, with the white flowers, rr.

RR x rr

Offspring: all offspring are Rr.

Incomplete dominance means that neither color shows dominance in the hybrid generation. This means that instead of solid red or solid white flowers, the heterozygous plants will display a mixture of both colors. Since the entire first generation will be heterozygous for the color trait, they will all be pink (a mix of white and red).

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Example Question #3 : Understanding Codominance And Incomplete Dominance

Black fur (A) is codominant with white fur (a) and brown eyes (B) are dominant to blue eyes (b) in mice. Two mice are heterozygous for both traits. If these mice are crossed, what color of fur will the offspring with genotype Aa express?

Black and white spotted

Black or white, depending on each individual offspring

Gray Black

Black and white spotted

Explanation:

Codominance means that more than one type of dominant allele for the same gene is present. If both black and white fur are dominant, then heterozygous (Aa) offspring would be spotted with black and white.

Note this is a different expression pattern from incomplete dominance, in which a blending of phenotypes occurs.

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Example Question #4 : Understanding Codominance And Incomplete Dominance

Two mice are heterozygous for both fur color and eye color. If these mice were crossed and all offspring have dark brown, almost-black fur, what is the best explanation?

The alleles for black and brown fur exhibit incomplete dominance

Independent assortment has occurred

Both parents have a recessive mutation

The alleles for black and brown fur exhibit complete dominance

The alleles for black and brown fur exhibit incomplete dominance

Explanation:

Incomplete dominance is when more than one type of dominant allele for the same gene is present. If black and brown alleles are incompletely dominant, they "compete" for expression, which produces offspring with a combination of the two colors.

Note that this pattern difference from codominance, in which the phenotypes will be present in separate spots of blotches.

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Example Question #1 : Understanding Codominance And Incomplete Dominance

If red (R) and white (r) are codominant alleles that determine flower color, what phenotypes are possible for this gene?

Red and white Pink only

Red, white, and pink

Red, white, and red-white spotted

Red, white, and red-white spotted

Explanation:

The possible genotypes for this trait are RR, Rr, and rr. To determine the answer, we must find the phenotype that corresponds to each genotype.

We know that RR is red and rr is white, since these genotypes are homozygous.

Now you must determine if Rr is red, white, or some other phenotype. Codominance means that both phenotypes show simultaneously, so the heterozygote would be both red and white, which is a distinct third phenotype. These organisms would show spots or splotches of each color.

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