Heterozygous means that an organism has two different alleles of a gene. For example, pea plants can have red flowers and either be homozygous dominant (red-red), or heterozygous (red-white). If they have white flowers, then they are homozygous recessive (white-white). Carriers are always heterozygous.
Is a white flower allele a phenotype?
Purebred white flowers have a genotype of two white alleles, which displays the white phenotype.
What is the genotype of white flowered plants? Since white flowers are recessive, the only possible genotype for a white-flowered plant is pp. As you can see, all of the offspring in Mendel’s first cross had a genotype of Pp. That’s why all of the plants in the p first generation had purple flowers.
What are 2 examples of alleles for flower color?
An example of alleles for flower color in pea plants are the dominant purple allele, and the recessive white allele; for height they are the dominant tall allele and recessive short allele; for pea color, they are the dominant yellow allele and recessive green allele.
Which trait white flowers or purple flowers is controlled by a dominant allele?
ANS: White flowers are controlled by a dominant allele. Purple flowers are controlled by a recessive allele. Dominant alleles are represented by capital letters, and recessive alleles are represented by the lowercase versions of the same letters.
What percentage of offspring have white flowers?
Predicting Offspring Phenotypes Therefore, in this cross, you would expect three out of four (75 percent) of the offspring to have purple flowers and one out of four (25 percent) to have white flowers. These are the same percentages that Mendel got in his first experiment.
Which flower color is dominant purple or white?
|Trait||Dominant Expression||Recessive Expression|
|Color of flower (P)||Purple||White|
|Form of ripe pods (I)||Inflated||Constricted|
|Color of unripe pods (G)||Green||Yellow|
|Position of flowers (A)||Axial||Terminal|
Can two plants with purple flowers produce offspring with white flowers?
Can two plants with purple flowers produce offspring with white flowers? Yes, if both parents are heterozygous for the trait.
What is the genotype for white fish?
White is the recessive phenotype, and it is produced by the homozygous recessive (aa) genotype.
What are the 5 patterns of inheritance?
There are five basic modes of inheritance for single-gene diseases: autosomal dominant, autosomal recessive, X-linked dominant, X-linked recessive, and mitochondrial. Genetic heterogeneity is a common phenomenon with both single-gene diseases and complex multi-factorial diseases.
What is allele example?
Different versions of a gene are called alleles. … For example, the allele for brown eyes is dominant, therefore you only need one copy of the ‘brown eye’ allele to have brown eyes (although, with two copies you will still have brown eyes).
What pairs of alleles determine?
The pair of alleles present on an individual’s chromosomes dictates what eye color will be expressed.
What are the different alleles?
An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. … Genotypes are described as homozygous if there are two identical alleles at a particular locus and as heterozygous if the two alleles differ.
What are two dominant alleles?
Homozygous dominant individuals have two dominant alleles, which produce the same enzyme. In homozygous recessive individuals, no dominant allele is present, and the phenotype only reflects the action of the recessive alleles.
What is the probability that the offspring will have purple flowers What is the probability that the offspring will have white flowers?
The probability that one of their offspring will have white flowers is 1/4 . The probability that one of wear their offspring will be short is 1/4 .
Is PP genotype or phenotype?
A simple example to illustrate genotype as distinct from phenotype is the flower colour in pea plants (see Gregor Mendel). There are three available genotypes, PP (homozygous dominant ), Pp (heterozygous), and pp (homozygous recessive).
You May Like Also