In a garden of plants of the same species 705 plants have red flowers while 224 had white flowers (i) Work out the ratio of the red to white flowers (ii)Using letter R to represent the dominant gene, work out the cross between F1 offspring and a white flowered plant (iii)what is the genotypic ratio from the cross in(i) above
Question
In a garden of plants of the same species 705 plants have red flowers while 224 had white flowers (i) Work out the ratio of the red to white flowers (ii)Using letter R to represent the dominant gene, work out the cross between F1 offspring and a white flowered plant (iii)what is the genotypic ratio from the cross in(i) above
Solution 1
(i) To work out the ratio of red to white flowers, you simply divide the number of red flowers by the number of white flowers. So, 705 red flowers divided by 224 white flowers equals approximately 3.15. Therefore, the ratio of red to white flowers is approximately 3:1.
(ii) If we use the letter R to represent the dominant gene (red flowers), then the genotype of the F1 offspring (first fil
Solution 2
(i) To work out the ratio of red to white flowers, you simply divide the number of red flowers by the number of white flowers. So, 705 red flowers divided by 224 white flowers equals approximately 3.15. Therefore, the ratio of red to white flowers is approximately 3:1.
(ii) If we use the letter R to represent the dominant gene (red flowers), then the genotype of the F1 offspring (first filial generation) from a cross between a red flowered plant and a white flowered plant would be Rr (heterozygous). If we cross this F1 offspring (Rr) with a white flowered plant (rr), we can use a Punnett square to determine the possible genotypes of the offspring:
R r r Rr rr r Rr rr
So, the possible genotypes of the offspring from this cross are 50% Rr (red flowers) and 50% rr (white flowers).
(iii) The genotypic ratio from the cross in (i) above is therefore 1:1 (Rr to rr).
Similar Questions
The photo shows a cross between a plant with white flowers and a plant with red flowers. The offspring is a plant with flowers that have both colors.Which pattern of inheritance is shown?A.CodominanceB.Incomplete dominanceC.Multiple genesD.Recessiveness
A scientist is studying flower color in a certain species. Red petals (R) are dominant to white petals (r). If a homozygous red-flowered plant is crossed with a heterozygous red-flowered plant, what is the probability of producing offspring with white petals?*1 point75%25%50%0%27. A farmer is breeding rabbits for fur color. Black fur (B) is dominant to white fur (b). If two rabbits with black fur are crossed and produce offspring with both black and white fur, what can be concluded about the genotypes of the parent rabbits?*1 pointOne parent rabbit is homozygous dominant and the other is homozygous recessive.One parent rabbit is heterozygous and the other is homozygous recessive.Both parent rabbits are homozygous dominant.Both parent rabbits are heterozygous.
In pea plants, purple flowers are dominant to white flowers, and axial flowers are dominant to terminal flowers. If a true-breeding plant with purple, axial flowers is crossed with a true-breeding plant with white, terminal flowers, what proportion of the F2 offspring will have purple, terminal flowers?Multiple choice question.1/23/43/161/49/16
Now, consider a brown colored maize plant is crossed with another maize plant producing the following offspring [Green color is dominant over brown color; follows Mendelian inheritance pattern] If these maize plants are crossed among themselves, what is the expected genotypic ratio of the offsprings? 3:1 1:1 1:2:1 1:1:1:1
If two plants heterozygous for both genes are crossed, what will be the ratio of blue to nonblueflowers?
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.