Question

У кукурузы темная окраска доминирует над светлой. Темный гомозиготный сорт скрестили со светлым сортом. Получили 56 гибридов F1. Их скрестили с растениями со светлой окраской. В F2 получилось 532 гибридов. А) Сколько разных генотипов среди растений F2? Б) Сколько получилось в F2 растений с темной окраской? В) Сколько разных фенотипов получилось в F1? Г) Сколько разных генотипов в F1? Д) Сколько в F2 гетерозиготных особей? 2. Карий цвет глаз доминирует над голубыми. В семье два голубоглазых сына. Один женился на голубоглазой женщине, а второй на кареглазой. Какой цвет глаз будет у детей в этих двух семьях?

Answer 1

Задача 2.
Решение:
там где голубоглазый мужчина женился на голубоглазой женщине все дети будут голубоглазыми аа=100%
а там где другой женился на кареглазой если она окажется доминантной то все дети будут кареглазыми Аа=100%,а если она гетерозиготная,то дети будут либо Аа=50%-кареглазыми,либо аа=50%-голубоглазые.

Answer 2

Genetics Problem

In this genetics problem, we are given information about the inheritance of traits in plants and humans. Let's break down the information and answer the questions step by step.

A) Number of Different Genotypes in F2 Generation

To calculate the number of different genotypes in the F2 generation, we can use the formula 3^n, where n is the number of heterozygous gene pairs. In this case, we can calculate the number of different genotypes using the formula 3^2, as there are two heterozygous gene pairs in the F2 generation.

Answer: There are 9 different genotypes among the plants in the F2 generation.

B) Number of Plants with Dark Color in F2 Generation

To calculate the number of plants with a dark color in the F2 generation, we can use the formula 1:2:1, which represents the genotypic ratio for a monohybrid cross. This ratio indicates that 1/4 of the plants will be homozygous dominant (dark color), 1/2 will be heterozygous, and 1/4 will be homozygous recessive (light color).

Answer: In the F2 generation, 133 plants will have a dark color.

C) Number of Different Phenotypes in F1 Generation

In the F1 generation, all the plants will have the same phenotype due to the dominance of the dark color. Therefore, there will be only one phenotype in the F1 generation.

Answer: There is 1 different phenotype in the F1 generation.

D) Number of Different Genotypes in F1 Generation

In the F1 generation, all the plants will have the same genotype due to the dominance of the dark color. Therefore, there will be only one genotype in the F1 generation.

Answer: There is 1 different genotype in the F1 generation.

Eye Color Inheritance

In the case of eye color inheritance, we are given information about the dominance of brown (kary) over blue eyes. Let's determine the potential eye colors of the children in the two families.

Family 1:

- One son with blue eyes marries a woman with blue eyes. Since both parents have blue eyes, they must both be homozygous for the recessive blue eye color (bb). Therefore, all their children will have blue eyes.

Answer: All children in this family will have blue eyes.

Family 2:

- One son with blue eyes marries a woman with brown eyes. Since brown eyes are dominant, the woman must be heterozygous (Bb) for brown eyes. The son is homozygous for blue eyes (bb). Therefore, all their children will have brown eyes, as the brown eye color is dominant.

Answer: All children in this family will have brown eyes.

In summary, all the children in the first family will have blue eyes, and all the children in the second family will have brown eyes.