Checking the probability of fusion between the gametes produced by two plants crossed using Punnet Square
What is the probability that an offspring of this cross expresses plants with purple flower phenotypes?
A cross between two heterozygous plants (Pp) will produce four possible offsprings with genotypes PP, Pp and pp in the ratio 1:2:1. The PP and Pp genotypes are purple flowered while the pp is white flowered. Hence, the probability of having purple flowered plants from this cross is 3 out of 4 i.e.
3/4
.
What is the probability of purple flowered offspring if two plants are heterozygous for purple flowers are crossed?
Two pea plants, both heterozygous for flower color, are crossed. The offspring will show the dominant purple coloration in a 3:1 ratio. Or,
about 75%
of the offspring will be purple.
What is the probability of two heterozygous purple flowers making offspring that have white flowers?
The probability that one of their offspring will have white flowers is
1/4
.
What is the ratio of purple flowers to white flowers offspring?
Mendel’s Results
Mendel noted the ratio of white flowered plants to purple-flowered plants was
about 3:1
. That is, for every three purple-flowered plants, there was one white flowered plant.
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 |
|---|
What is the probability of the plants with purple flowers?
Checking the probability of fusion between the gametes produced by two plants crossed using Punnet Square method, it is seen that
75% plants
will have at least one dominant allele (P) and thus will bear purple flowers. Only 25% plants will have recessive allele in homozygous state (pp).
Can two plants with white flowers produce offspring with purple flowers?
Crossing a plant with white flowers and a plant that is homozygous for purple flowers results in offspring with what color combinations? … Can two plants with purple flowers produce offspring with white flowers?
Yes
, if both parents are heterozygous for the trait. You just studied 36 terms!
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.
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).
When crossing purple flower plants Why would some of the offspring have white flowers?
Explanation: Let us consider a cross between two plants heterozygous for purple flowers. Each plant will produce two types of gametes, i.e. 50% gametes carrying (P) allele and 50 % carrying (p) allele. These
plants will bear white flowers
.
What is the chance that the offspring will be short with white flowers?
Explanation: In a flowering plant, tall (T) is dominant to short (t), and blue (B) is dominant to white (b) flowers. A tall plant with white flowers (TTbb) is crossed with a short plant with blue flowers (ttBB) the chance that the offspring will be short with white flowers is
50%
.
What is the phenotype of a heterozygous flower?
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.
Why did Mendel see a 3 1 ratio of purple to white flowers in the F2 cross?
Traits are inherited independently
Mendel also experimented to see what would happen if plants with 2 or more pure-bred traits were cross-bred. He found that each trait was inherited independently of the other and produced its own 3:1 ratio. This is the principle of
independent assortment
.
What will happen if you mix a heterozygous red flower with a homozygous white flower?
What will happen if you mix a heterozygous red flower with a homozygous white flower? 1 Answer. Yes, if the type of inheritance is incomplete dominance,
the heterozygous genotype Rr will be a blend of the R and r alleles
.
When Gregor Mendel crossed pure breeding purple flowers with pure breeding white flowers What did he notice in the F1 offspring?
When Mendel crossed a true-breeding purple-flowered
pea plant
with a true-breeding white-flowered pea plant, he observed that all of the F1 offspring had purple flowers. When these F1 plants were selfed, he found 3/4 were purple and 1/4 were white.
