Question

б. У помідорів червоне забарвлення плодів визначається домінантним геном R, жовте – r; нормальна висота рослин — D, карликовість — d. Наявні сорти жовтоплідні нормальні та червоноплідні карликові. Як отримати гомозиготні форми: червоноплідні нормальні та жовтоплідні карликові?​

Answer 1

Відповідь:

Пояснення:

Answer 2

Understanding Tomato Plant Genetics

In tomato plants, the color of the fruit and the plant's height are determined by specific genes. The red color of the fruit is determined by the dominant gene R, while the yellow color is determined by the recessive gene r. Similarly, the normal plant height is determined by the dominant gene D, while dwarfism is determined by the recessive gene d.

Obtaining Homozygous Forms

To obtain homozygous forms of red-fruited normal and yellow-fruited dwarf tomato plants, we can use a breeding technique called selective breeding.

1. Red-Fruited Normal: To obtain homozygous red-fruited normal plants, we can cross two heterozygous red-fruited normal plants (RrDd x RrDd). This will result in a Punnett square with the potential for obtaining homozygous red-fruited normal plants (RRDD).

- The Punnett square for the cross RrDd x RrDd would show the potential genotypes of the offspring, including the possibility of obtaining homozygous red-fruited normal plants.

- The Punnett square would demonstrate the genetic combinations and the probability of obtaining the desired homozygous form.

2. Yellow-Fruited Dwarf: To obtain homozygous yellow-fruited dwarf plants, we can similarly cross two heterozygous yellow-fruited dwarf plants (rrdd x rrdd). This will result in a Punnett square with the potential for obtaining homozygous yellow-fruited dwarf plants (rrdd).

- The Punnett square for the cross rrdd x rrdd would show the potential genotypes of the offspring, including the possibility of obtaining homozygous yellow-fruited dwarf plants.

By selectively breeding the plants based on their genotypes, it is possible to obtain the desired homozygous forms of tomato plants with specific traits.