Why did the F1 offspring of Mendel’s classic pea cross always look like one of the two parental varieties? One phenotype was completely dominant over another.
Why did F1 offspring of Mendel’s classic pea plant always look like one of the two parental varieties?
One of them contained dominant alleles while the other one possessed recessive alleles. In the first filial generation (F1), all the offspring were heterozygous. Each offspring received a dominant allele and a recessive allele. Due to this, they resemble one of their parents.
Why did Mendel continue some of his experiments to the F2 or F3 generation quizlet?
Why did Mendel continue some of his experiments to the F2 or F3 generation? To observe whether or not a recessive trait would appear.
What do the terms monohybrid cross and dihybrid cross indicate?
A monohybrid cross produces a single progeny, whereas a dihybrid cross produces two progeny.
What do we mean when we use the terms dihybrid cross?
A dihybrid cross describes a mating experiment between two organisms that are identically hybrid for two traits. A hybrid organism is one that is heterozygous, which means that is carries two different alleles at a particular genetic position, or locus.
What is one of the reasons why Gregor Mendel chose to study pea plants?
He chose peas because they had been used for similar studies, are easy to grow and can be sown each year. Pea flowers contain both male and female parts, called stamen and stigma, and usually self-pollinate. Self-pollination happens before the flowers open, so progeny are produced from a single plant.
What happened when Mendel crossed two traits of a character in a pea plant?
Answer: Mendel also experimented to see what would happen if plants with 2 or more pure-bred traits were cross-bred. He found that each trait was inherited independently of the other and produced its own 3:1 ratio. This is the principle of independent assortment .
What was the most significant conclusion that Gregor Mendel Drew?
) What was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants? Traits are inherited in discrete units, and are not the results of “blending.”
Which of the following statements correctly explains the fact that all seven of the pea plant traits?
Which of the following statements correctly explains the fact that all seven of the pea plant traits studied by Mendel obeyed the principle of independent assortment? All of the genes controlling the traits behaved as if they were on different chromosomes.
How many possible gametes could be produced as the result of independent assortment from an individual with the genotype AaBbCC?
Answer and Explanation: The gametes produced by the individual with the genotype AaBbCC are as follows: Hence, only four gametes can be formed.
What is the genotype of the F1 generation of the monohybrid cross?
All F1-hybrid plants have the genotype Ss and all are spherical (dominant characteristic). The recessive alleles segregate during gamete formation. As a result, one out of four possible combinations of F2-generation plants will have the homozygous recessive genotype (ss).
What is the F1 generation in a monohybrid cross?
Generally, the monohybrid cross is used to determine the dominance relationship between two alleles. The cross begins with the parental generation. One parent is homozygous for one allele, and the other parent is homozygous for the other allele. The offspring make up the first filial (F1) generation.
What is the difference between a Monohybrid genetic cross and a Dihybrid genetic cross?
A monohybrid cross is defined as the cross happening in the F1 generation offspring of parents differing in one trait only. A dihybrid cross is a cross happens F1 generation offspring of differing in two traits.
What did Mendel always notice about the f1 offspring in his experiments in terms of their phenotype?
Working with garden pea plants, Mendel found that crosses between parents that differed for one trait produced F1 offspring that all expressed one parent’s traits. The traits that were visible in the F1 generation are referred to as dominant, and traits that disappear in the F1 generation are described as recessive.
Why is dihybrid cross important?
The dihybrid cross was initially valuable as an experimental test of Mendelian principles, showing that traits may be inherited independently, with each obeying Mendel’s rules. Later, it was a key tool in the mapping of genes to chromosomes and the elucidation of how genes may interact to determine a phenotype.
What was the outcome of the F1 generation in Mendel’s first experiment?
5 Mendel’s first experiment with pea plants. Figure 5.10. 5 shows Mendel’s first experiment with pea plants. The F1 generation results from the cross-pollination of two parent (P) plants, and it contains all purple flowers.
What happens when pea plants showing two different characteristics rather than just one are bred with each other?
Answer. Answer: If the inheritance of more than one pair of characters is studied simultaneously the factors of genes for each pair of characters sort out independently.
When Mendel used true breeding white flowers and true breeding purple flowers as the parental generation What were the results purple flower is dominant over white?
When Mendel used true-breeding white flowers and true-breeding purple flowers as the parental generation, what were the results? (Purple flower is dominant over white.) the chromosome number would double in each generation. You just studied 20 terms!
What happened when Mendel crossed pea plants Class 10?
In one of the experiments with pea plants, Mendel observed that when a homozygous tall pea plant (TT) is crossed with a homozygous dwarf pea plant (tt), in the first generation, only tall plants appear.
What Did Mendel’s cross-pollination of pea plants prove?
Mendel’s cross-pollination of pea plants proved that genes of two separate organisms are passed to their offspring.
What are three conclusions that Gregor Mendel made in his research that contributed to the study of genetics?
He formulated several basic genetic laws, including the law of segregation, the law of dominance, and the law of independent assortment, in what became known as Mendelian inheritance.
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