Question

Подскажите решение, пожалуйста У томатів ген червоного кольору домінує над жовтим, а високорослість над карликовістю.  Якими будуть гібриди першого покоління від схрещування червоноплідних високорослих томатів дигомозиготних за обома ознаками з дигомозиготними жовтоплідними високорослими.

Answer 1

Ответ:

Дано:  

А - красный  

а - желтый  

В - высокорослый  

в - карликовый  

Решение:  

Р. ААВВ * ааВВ  

G:   АВ        аВ  

F1:

АаВВ - 100% красные высокорослые томаты

Answer 2

Dominance of Red Color and Tallness in Tomatoes

In tomatoes, the gene for red color (R) is dominant over the gene for yellow color (r), and the gene for tallness (T) is dominant over the gene for dwarfness (t).

When two heterozygous individuals (RrTt) with red color and tallness are crossed, the possible combinations of alleles in their gametes are as follows:

- Parent 1 (RrTt): RT, Rt, rT, rt - Parent 2 (RrTt): RT, Rt, rT, rt

By combining the gametes from both parents, we can determine the possible genotypes and phenotypes of the offspring.

Punnett Square for the First Generation Hybrids

| | RT | Rt | rT | rt | |-----|------|------|------|------| | RT | RRTT | RRtt | RrTT | Rrtt | | Rt | RRtT | RRtt | RrTt | Rrtt | | rT | RrTT | RrTt | rrTT | rrtt | | rt | RrtT | Rrtt | rrtT | rrtt |

From the Punnett square, we can see that the first generation (F1) hybrids from the cross between red-colored tall tomatoes (RrTt) and yellow-colored tall tomatoes (RrTt) will have the following genotypes and phenotypes:

- Genotypes: RRTT, RRtt, RrTT, Rrtt, RRtT, RrTt, RrTt, rrtt - Phenotypes: Red tall, red tall, red tall, red tall, red tall, red tall, red tall, yellow tall

Therefore, all the F1 hybrids will have red color and tallness, as the dominant traits for both characteristics will be expressed.

Please note that this is the expected outcome based on Mendelian genetics and assumes that there are no other modifying factors or genetic interactions involved.