Biology, 19.03.2020 08:36 fallenangelsayshush

A plant breeder is trying to develop a deep purple violet. She knows the violets come in deep purple, light purple, and white. She crosses two violets hoping to produce only the deep color. Which parent plants should she use? At least one parent must be pp. Both parents must be Pp. At least one parent must be Pp. Both parent must be PP.

Answers: 2

Show answers

Answers

Answer from: allisonhall0925

The correct answer is: Both parent must be PP.

Explanation:

The given question states that for flower color of the violet plants there are three phenotypes possible, purple, light purple and white.The flower color coding gene is governed by two variants or alleles in which there is an absence of complete dominance of one allele over the other as, if complete Mendelian dominance was there, only two phenotypes for flower color would have existed, purple and white, without the existence of any intermediate color, light purple.This indicates the existence of a Non-Mendelian pattern of inheritance with respect to the gene encoding for the violet flower color.As the intermediate phenotype of flower color is light violet, it indicates that in these plants neither of the two alleles are capable of showing dominance and this is an example of Incomplete dominance.Let the two alleles of the flower color coding gene be: P and p.Then the possible genotypes are: PP, Pp, pp.The corresponding phenotypes are: Purple, Light purple and White.Crossing all possible parents,

1. P P

P PP PP

Phenotypes (Purple) (Purple)

P PP PP

Phenotypes (Purple) (Purple)

2. P P

P PP PP

Phenotypes (Purple) (Purple)

p Pp Pp

Phenotypes (Light Purple) (Light Purple)

3. P p

P PP Pp

Phenotypes (Purple) (Light Purple)

p Pp pp

Phenotypes (Light Purple) (White)

4. P P

p Pp Pp

Phenotypes (Light Purple) (Light Purple)

p Pp Pp

Phenotypes (Light Purple) (Light Purple)

5. P p

p Pp pp

Phenotypes (Light Purple) (White)

p Pp pp

Phenotypes (Light Purple) (White)

6. p p

p pp pp

Phenotypes (White) (White)

p pp pp

Phenotypes (White) (White)

According to the results of the above crosses, we find that the plant breeder should use such parents which are homozygous for the P allele, that is, both the parents must have the PP genotype. Then only all the offspring produced by crossing these parents will develop purple colored violet only.

Answer from: Quest

mendel's first law states that during the formation of reproductive cells , pairs of hereditary factors for a specific trait separate so that offspring receive one factor from each parent.

explanation:

Answer from: Quest

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

Another question on Biology

Biology, 22.06.2019 08:30

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

Answers: 1

Answer

Biology, 22.06.2019 11:30

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.

Answers: 1

Answer

Biology, 22.06.2019 13:30

Which of th following best describes how genes produce traits in an organism?

Answers: 2

Answer

Biology, 22.06.2019 16:30

How did the club fungi get its name? a. it is named for the club-shaped seeds it produces. b. it is named for the way individual species grow together in small groups called “clubs.” c. it is named for the club-shaped area where it produces spores. d. it is named for the club-like mechanism it uses to kill its prey.

Answers: 2

Answer

You know the right answer?

A plant breeder is trying to develop a deep purple violet. She knows the violets come in deep purple...

Questions