How Can Two Pea Plants That Have Different Genotypes For Seed Color Be Identical In Phenotype

How Can Two Pea Plants That Have Different Genotypes For Seed Color Be Identical In Phenotype?

How can two pea plants that have different genotypes for seed color be identical in phenotype? One of the two plants could be homozygous for the dominant allele while the other could be heterozygous. … In snapdragons flower color is inherited as a trait with incomplete dominance.

How can two plants that have different genotypes for a particular inherited characteristics be identical in phenotype?

Recall that Mendel’s pea-plant characteristics behaved in the same way in reciprocal crosses. Therefore the two possible heterozygous combinations produce offspring that are genotypically and phenotypically identical despite their dominant and recessive alleles deriving from different parents.

Can different genotypes have the same phenotype?

In addition different genotypes can lead to the same phenotype. This happens because genes have different alleles. For some genes and traits certain alleles are dominant while others are recessive.

What genotype is it when there are two identical alleles for a trait?


Identical alleles means that a person’s genotype for that trait is homozygous.

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What are the two possible phenotypes for pea shape?

The possible genotypes are PpYY PpYy ppYY and ppYy. The former two genotypes would result in plants with purple flowers and yellow peas while the latter two genotypes would result in plants with white flowers with yellow peas for a 1:1 ratio of each phenotype.

How Mendel’s pea plants helped us understand genetics?

Why would a pea plant that is heterozygous for plant height have the dominant phenotype?

Question: QUESTION 6 A pea plant that is heterozygous for plant height shows the dominant phenotype of “tall because the dominant allele masks the effect of the recessive allele. Othere is no recessive allele in a heterozygous genotype. … dominant alleles are better stronger and more common in the population.

Can two different genotypes result in identical phenotypes?

Can organisms with different genotypes have the same phenotypes? … The answer is yes two different genotypes can result in the same phenotype. Remember the recessive phenotype will be expressed only when the dominant allele is absent or when an individual is homozygous recessive (tt) (Figure below).

How can two plants with different genotypes have the same phenotype?

Mandira P. Same phenotype but different genotype is possible due to presence of dominant allele. … In both the above cases the trait controlled by dominant allele will be expressed and hence there will be no distinction in phenotype. This phenomenon is seen in all organisms including plants.

Why do two genotypes have the same phenotype?

Genotype is the alleles or the genetic makeup for the organism. Organisms can have the same phenotype when (1) they both have dominant alleles for example TT or (2) are hybrids for example Tt. Since the dominant allele will be expressed in the hybrid both of these cases will produce the same phenotype.

How can someone have two different alleles of the same gene?

An organism in which the two copies of the gene are identical — that is have the same allele — is called homozygous for that gene. An organism which has two different alleles of the gene is called heterozygous.

When a plant have two different alleles of a gene it is called?

The genetics term heterozygous refers to a pair of genes where one is dominant and one is recessive – they are different.

Can alleles be identical or different for any given gene in a somatic cell?

They can be identical or different for any given gene in a somatic cell. They can be dominant or recessive. They can represent alternative forms of a gene. Only A and B are correct.

How would you find out the genotype of a pea plant?

To determine the genotype of the pea plant with purple flowers the students can use the process of Test cross. In test cross the pea plant whose genotype is to be determined is crossed with a homozygous recessive parent (pp) having white flowers.

How many different phenotypes are possible?

There are three common alleles in the ABO system. These alleles segregate and assort into six genotypes as shown in Table 1. As Table 1 indicates only four phenotypes result from the six possible ABO genotypes.

How does genotype affect phenotype?

Definitions: phenotype is the constellation of observable traits genotype is the genetic endowment of the individual. Phenotype = genotype + development (in a given environment). … In a narrow “genetic” sense the genotype defines the phenotype.

How pea plant was helpful in birth of genetics?

To study genetics Mendel chose to work with pea plants because they have easily identifiable traits (Figure below). For example pea plants are either tall or short which is an easy trait to observe. … Mendel also used pea plants because they can either self-pollinate or be cross-pollinated.

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What are phenotypes and genotypes?

A phenotype is an individual’s observable traits such as height eye color and blood type. The genetic contribution to the phenotype is called the genotype. Some traits are largely determined by the genotype while other traits are largely determined by environmental factors.

Why is Mendel’s pea experiment important to genetics?

Gregor Mendel through his work on pea plants discovered the fundamental laws of inheritance. He deduced that genes come in pairs and are inherited as distinct units one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits.

What is the genotype of a pea plant that is heterozygous for tallness?

CP Bio Test Units 9 and 10a Genetics and DNA
Question Answer
Tallness (T) is dominant over shortness (t) in pea plants. What is the genotype of a pea plant that is: heterozygous dominant for tallness? Tt

What are the heterozygous genotypes?

(HEH-teh-roh-ZY-gus JEE-noh-tipe) The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote).

What characteristics did Mendel study in pea plants?

The traits that Mendel studied are listed below:
  • Form of ripe seed (R) – smooth or wrinkled.
  • Color of seed albumen (Y) – yellow or green.
  • Color of flower (P) – purple or white.
  • Form of ripe pods (I) – inflated or constricted.
  • Color of unripe pods (G) – green or yellow.
  • Position of flowers (A) – axial or terminal.

Can identical twins have different genotype?

Box 2.1 Monozygotic and Dizygotic Twins

The result is the creation of two separate but genetically identical offspring. … These two individuals share the same amount of genetic material as would any two children from the same mother and father. In other words they possess a different genotype and phenotype.

How is the phenotype of a pea plant different from its genotype?

An organism’s genotype is its specific combination of alleles for a given gene. … The phenotype is the physical manifestation of an organism’s allellic combination (genotype). For the pea plants if the red allele is dominant and the white allele is recessive only two phenotypes are possible.

What is the term that describes an organism that has two identical dominant or two identical recessive alleles for a particular trait?

If an organism contains two identical alleles for a particular trait the genotype for this trait is said to be homozygous.

How can two organisms have the same phenotype but different genotypes quizlet?

The combination of alleles in the offspring. … The masking of recessive alleles can result in organisms with the same phenotype but different genotypes. Organisms with two dominant alleles (homozygous dominant and one recessive allele (heterozygius).

Why don t similar genotypes produce the same phenotype?

Why don’t similar genotypes always produce the same phenotype? Animals display different phenotypes dependent on diet not genotype. … the allele’s frequency should not change from one generation to the next but its representation in homozygous and heterozygous genotypes may change.

How is genotype expressed?

The genotype is expressed when the information encoded in the genes’ DNA is used to make protein and RNA molecules. The expression of the genotype contributes to the individual’s observable traits called the phenotype.

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What is the difference between an allele and a genotype?

The key difference between allele and genotype is that the allele is one of the variant forms of a gene located at the same genetic locus of a chromosome while genotype is the genetic constitution of a particular trait. Genetics is the study of genes and hereditary patterns in organisms.

What do genotypes determine?

Simple. Genotype is the collection of genes responsible for the various genetic traits of a given organism. Genotype refers specifically to the genes not the traits that is the raw information in an organism’s DNA. Genotype is determined by the makeup of alleles pairs of genes responsible for particular traits.

When a plant have two alleles of contrasting character it is?

Question : When a plant have two alleles of contrasting characters it is called :-
Question When a plant have two alleles of contrasting characters it is called :-
Chapter Name Genetics & Molecular Basis Of Inheritance And Mutation
Subject Biology (more Questions)
Class 12th
Type of Answer Video Text & Image

How are the alleles of a gene different from each other what is its importance?

Alleles of a particular gene differ from each other genetically in their nucleotide sequences. As a result their products and traits expressed could be different. Significance:Alleles add variability in the population.

How are genes and alleles related to genotype and phenotype?

Different forms of a gene are called alleles. … The alleles an individual has at a locus is called a genotype. The genotype of an organism is often expressed using letters. The visible expression of the genotype is called an organism’s phenotype.

Which genotype consists of two identical genes for a given character?

Homozygous also refers to a genotype consisting of two identical alleles of a gene for a particular trait. An individual may be homozygous dominant (AA) or homozygous recessive (aa). Individuals who are homozygous for a trait are referred to as homozygotes.

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