Why is the pea wrinkled-seed allele a recessive allele? The trait associated with the allele is not exhibited in heterozygotes. Mendel studied the inheritance of several types of pea-plant traits, including seed color. Seed color is an observable trait of the plant and is termed a(n) ___________________ .
Why is the pea wrinkled seed allele a recessive allele quizlet?
Why is the allele for wrinkled seed shape in garden peas considered recessive? The trait associated with the allele is not expressed in heterozygotes. … Because no other phenotype is ever observed in a pure-line population, this implies that only one allele is present.
Are wrinkled peas dominant or recessive?
Because the allele that produces wrinkled peas is recessive, the offspring of this cross will all have wrinkled peas.
Are wrinkled seeds a recessive trait?
Wrinkled peas need to have genotype rr, since the wrinkled trait (r) is recessive.
Why do green pea plants have to have two recessive alleles?
Turns out they have yellow peas because the yellow version, Y, is dominant over the recessive green version, y. Y always wins out over y: When a pea plant makes seeds, only one of its two copies of the color gene goes into the seed. So if you have two green pea plants, each can only pass a green version.
Is a recessive allele weaker than a dominant allele?
The different forms of a gene are called alleles. If both alleles are are identical, the organism is said to be homozygous for that trait. … The stronger allele is said to dominant, and the weaker allele that is masked is said to be recessive.
Why was it important for Emily’s parents to look at health issues in their family’s past?
Why was it important for Emily’s parents to look at health issues in their family’s past? It might be possible to discover if CF was present in other family members. … she must have inherited a CF allele from both her mother and her father.
What is the reason some peas are wrinkled?
They discovered that the high sugar content in developing wrinkled seeds draws in large amounts of water through osmosis, causing the seed to swell. The seeds then lose volume as they mature and dry out to give a wrinkled appearance.
What are the 3 principles of Mendelian genetics?
Mendel’s studies yielded three “laws” of inheritance: the law of dominance, the law of segregation, and the law of independent assortment. Each of these can be understood through examining the process of meiosis.
What is the meaning of wrinkled seeds?
The high sugar content of wrinkled peas means that water moves in by osmosis, causing the pea to expand inside its seed coat. Once it is mature, it loses the water as it dries and shrivels. But having been stretched, the seed coat then wrinkles as the pea inside shrinks.
Which is an example of an inherited trait?
Inherited traits include things such as hair color, eye color, muscle structure, bone structure, and even features like the shape of a nose. Inheritable traits are traits that get passed down from generation to the next generation. This might include things like passing red hair down in a family.