Question

Use the following information to answer the question below.

Two true-breeding stocks of pea plants are crossed. One parent has red, axial flowers and the other has white, terminal flowers; all F1 individuals have red, axial flowers. The genes for flower colour and location assort independently.


If 1000 F2 offspring resulted from the cross, approximately how many of them would you expect to have red, terminal flowers?

Answer 1

In the F2 generation, approximately 18.75% of the offspring would have red, terminal flowers.

Step-by-step explanation:

Pea plant genetics, pioneered by Gregor Mendel, laid the foundation for modern genetic studies. Mendel's experiments with pea plants revealed the principles of inheritance, demonstrating the segregation and independent assortment of traits. His work provided key insights into the hereditary nature of traits and the concept of genetic dominance.

If the genes for flower color and location assort independently, then the F2 generation would exhibit a phenotypic ratio of 9:3:3:1. This means that approximately 9/16 or 56.25% of the offspring would have red, axial flowers, while 3/16 or 18.75% of the offspring would have red, terminal flowers.

Answer 2

750

Step-by-step explanation:

With the f1 generation all being red flowers we can conclude that Red is dominant (R) and white is recessive (r).

This leads to the f1 generation having Rr. If you breed two Rr together you get

1 RR

2 Rr

1 rr

75% of the f2 will have red flowers. So if you take 1000 and multiply it by .75 you will get 750

Approximately 750 flowers will be Red.