Since all the heterozygous offspring are yellow, then
the yellow allele must be dominant over the recessive green allele
. The green allele didn't disappear; its effect is not seen in heterozygotes.
How do you know which allele is dominant?
A dominant allele is denoted by
a capital letter (A versus a)
. Since each parent provides one allele, the possible combinations are: AA, Aa, and aa. Offspring whose genotype is either AA or Aa will have the dominant trait expressed phenotypically, while aa individuals express the recessive trait.
Which of the peas traits yellow or green is dominant explain your answer?
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.
What color of allele is dominant?
Black
is dominant, which means black individuals must have at least one B allele. Their genotype could be either BB or Bb.
Which allele is dominant purple or yellow )? How do you know?
The ratios are the same. Mendel's law of dominance gave a ratio of 3:1 using the Punnett square
What color of pea seed is dominant?
| Trait Dominant Expression Recessive Expression | Form of ripe seed (R) Smooth Wrinkled | Color of seed albumen (Y) Yellow Green | Color of flower (P) Purple White | Form of ripe pods (I) Inflated Constricted |
|---|
Are wrinkled seeds dominant or recessive?
| Trait Dominant Expression Recessive Expression | Form of ripe seed (R) Smooth Wrinkled | Color of seed albumen (Y) Yellow Green | Color of flower (P) Purple White |
|---|
What does BB mean in biology?
When discussing genotype, biologists use uppercase letters to stand for dominant alleles and lowercase letters to stand for recessive alleles. With eye color, for instance, “B” stands for a brown allele and “b” stands for
a blue allele
. … In the eye color example, this genotype is written bb.
What traits are dominant?
- Dark hair is dominant over blonde or red hair.
- Curly hair is dominant over straight hair.
- Baldness is a dominant trait.
- Having a widow's peak (a V-shaped hairline) is dominant over having a straight hairline.
- Freckles, cleft chin and dimples are all examples of a dominant trait.
When two alleles are the same they are?
Genotypes are described as
homozygous
if there are two identical alleles at a particular locus and as heterozygous if the two alleles differ. Alleles contribute to the organism's phenotype, which is the outward appearance of the organism.
What is the percentage of a homozygous dominant offspring?
| PARENT GENOTYPES OFFSPRING PHENOTYPES | pure (homozygous) dominant x anything 100% of offspring with dominant trait | hybrid x homozygous recessive 50% dominant trait, 50% recessive trait | hybrid x hybrid 75% with dominant trait & 25% with recessive trait | homozygous recessive x homozygous recessive 100% recessive trait |
|---|
Which is dominant purple or white flowers?
These are the parental generation. Their offspring—the first filial, or F1, generation—each receive one purple allele and one white allele. Since all of the offspring have the purple phenotype, this tells us that
the purple allele is dominant to the white allele
.
What color of corn is dominant?
The colours of the corn kernels are inherited from the ‘parent' plants. The corn kernels exhibit a large quantity of easy to recognise phenotypes through the colour and form.
Purple corn
results from a dominant allele, whereas yellow corn is produced by a recessive allele of the same gene.
What colour are yellow peas before they are grown?
Yellow Peas are “field peas”, which are meant to be used dried rather than eaten fresh. The skin (seed coat) of the peas is a
light yellow
. Inside, the peas are a darker yellow, though the colour fades when cooked. They are slightly larger than green peas.
Is it possible for a 2 green pea plant to have a yellow offspring?
These offspring are said to be
heterozygous
, meaning that they have two different alleles for pea color. Despite the fact that both alleles are present in the offspring, the traits did not blend together to result in yellowish-green peas.
Why is pea yellow?
Fusarium wilt, root rot, Ascochyta blight, and downy mildew are all fungi that may afflict these crops and result in yellowing pea plants. … Pea plants yellow at the base of the plant and stems wither and
eventually die back
. Spores are dispersed through contact, wind, and water.
