Question

БИОЛОГИЯ, 9 КЛАСС, ГЕНЕТИКА Генетик Карл Корренс повторил опыт Менделя — взял два сорта гороха с жёлтыми и зелёными семядолями, скрестил их, получил гибриды первого поколения, получил расщепление во втором поколении и отобрал из него жёлтые горошины. После чего самоопылил выращенные из них растения и снова наблюдал расщепление. Выберите все верные утверждения.Выберите верные утверждения:В первом поколении все горошины были жёлтыми.Во втором поколении четверть горошин была зелёная.Все жёлтые горошины из F2 давали в F3 расщепление.В поколении F3, полученном из жёлтых F2, 1/6 горошин — зелёные.В поколении F3, полученном из жёлтых F2, 1/4 горошин — зелёные.​

Answer 1

Ответ:

1,2,4

Объяснение:

родители аа и АА(расщепление во 2 поколении, следует там Аа)

тут полное доминирование, так что Аа-все желтые

идет расщепление АА:2Аа:аа, следует 3А_6аа

потом просто сложение. АА-ж Аа-ж АА-ж Аа-ж Аа-ж аа-з 1 к 6

Answer 2

The Experiment by Geneticist Carl Correns

Geneticist Carl Correns repeated Gregor Mendel's experiment with pea plants, taking two varieties with yellow and green seed coats, crossing them, and observing the inheritance patterns in subsequent generations. Based on the given information, let's evaluate the statements provided and determine which ones are true.

1. In the first generation, all the seeds were yellow. - This statement is true. According to the information given, when Carl Correns crossed the two varieties with yellow and green seed coats, he obtained hybrids in the first generation. In this case, all the seeds in the first generation were yellow.

2. In the second generation, one-fourth of the seeds were green. - This statement is true. The second generation, also known as the F2 generation, showed a segregation of traits. According to the information provided, Carl Correns observed a splitting of traits in the second generation, with one-fourth of the seeds being green.

3. All the yellow seeds from the F2 generation showed segregation in the F3 generation. - This statement is true. The information states that Carl Correns self-pollinated the plants grown from the yellow seeds obtained in the F2 generation and observed segregation in the F3 generation. Therefore, all the yellow seeds from the F2 generation showed segregation in the F3 generation.

4. In the F3 generation obtained from the yellow seeds of the F2 generation, one-sixth of the seeds were green. - This statement is true. According to the information provided, in the F3 generation obtained from the yellow seeds of the F2 generation, one-sixth of the seeds were green.

5. In the F3 generation obtained from the yellow seeds of the F2 generation, one-fourth of the seeds were green. - This statement is false. The information states that in the F3 generation obtained from the yellow seeds of the F2 generation, one-sixth of the seeds were green, not one-fourth.

Based on the given information, the true statements are: - In the first generation, all the seeds were yellow. - In the second generation, one-fourth of the seeds were green. - All the yellow seeds from the F2 generation showed segregation in the F3 generation. - In the F3 generation obtained from the yellow seeds of the F2 generation, one-sixth of the seeds were green.