Why is the allele for wrinkled seed shape in peas considered recessive?
Why is the allele for wrinkled seed shape in garden peas considered recessive? The trait associated with the allele is not expressed in heterozygotes. Mendel crossed yellow-seeded and green-seeded pea plants and then allowed the offspring to self-pollinate to produce an F2 generation.
Why is the pea wrinkled seed allele a recessive allele quizlet?
Why is the allele for wrinkled seed shape in garden peas considered recessive? … Because no other phenotype is ever observed in a pure-line population, this implies that only one allele is present.
What are the genotypes of the parents and what kind of gametes will they produce?
What are the genotypes of the parents, and what kind of gametes will they produce? a. The genotype of the plant with yellow round seeds will be YYRR and produce Y gametes and R gametes, while the genotype of the plant with green wrinkled seeds will be yyrr and produce y gametes and r gametes.
How can someone have two different alleles of the same gene Select all that apply?
two alleles of a gene duplicate during gamete formation such that every gamete receives both alleles. all alleles of a gene separate during gamete formation such that each gamete receives two variants of a gene.
What is meant by an allele?
An allele is one of two or more versions of a gene. An individual inherits two alleles for each gene, one from each parent. … Though the term allele was originally used to describe variation among genes, it now also refers to variation among non-coding DNA sequences.
What is the recessive color of a pea plant’s seed coat?
|In pea plants, the dominant trait for Seed Color is Yellow. What is the Recessive trait?||green, anything but yellow|
|If a pea plant has a gray seed coat color, is that the pea plants phenotype of genotype?||phenotype|
Why is the allele for round seed shape in garden peas considered dominant?
Why is the allele for round seed shape in garden peas considered dominant? -The allele is more common than the recessive allele. … -Individuals with the allele have greater fitness than that of individuals with the recessive allele. -The trait associated with the allele is expressed in heterozygotes.
What is particulate about particulate inheritance?
Particulate inheritance is a pattern of inheritance discovered by Mendelian genetics theorists, such as William Bateson, Ronald Fisher or Gregor Mendel himself, showing that phenotypic traits can be passed from generation to generation through “discrete particles” known as genes, which can keep their ability to be …
Why is it technically incorrect to refer to alleles found in haploid organisms as either dominant or recessive?
The alleles present in haploid organisms like bacteria do not have dominant or recessive traits because dominance and recessiveness occur when gene alleles interact. The haploid organism has only one copy of the gene with only one allele. Hence no dominant or recessive trait occurs.
What genotype in the offspring will result in wrinkled seeds?
This means that plants with both genotypes WW and Ww have wrinkled seeds, and only those with genotype ww have round seeds. If two plants of genotype Ww are crossed, the probability an offspring has wrinkled seeds is 3/4, and the probability it has round seeds is 1/4.
Is a recessive allele weaker than a dominant allele?
We all have pretty much the same genes, just different versions or alleles. And not all versions of a gene are created equal. Some versions are stronger than others. The stronger version is called dominant and the weaker one recessive.
How does an allele cause a trait in an organism?
Alleles produce phenotypes (or physical versions of a trait) that are either dominant or recessive. The dominance or recessivity associated with a particular allele is the result of masking, by which a dominant phenotype hides a recessive phenotype.
Why are some alleles dominant and some recessive?
Different versions of a gene are called alleles. Alleles are described as either dominant or recessive depending on their associated traits. … The resulting characteristic is due to both alleles being expressed equally.
Why do recessive alleles seem to vanish in some generations and reappear in later generations?
Recessive alleles seem to vanish in some generations and reappear in later generations because they are masked by a dominant allele….
What do alleles do?
Alleles contribute to the organism’s phenotype, which is the outward appearance of the organism. Some alleles are dominant or recessive. When an organism is heterozygous at a specific locus and carries one dominant and one recessive allele, the organism will express the dominant phenotype.