Expert-verified answer Gene for tall plant is T and dwarf plants is t. In nature, tall pea plant is found more because it is a
Why are some pea plants tall and other short in nature?
The pea plant will grow taller if the gene sequence is such that it creates a hormone that impacts the height attribute. If the gene sequence is in such a way that this hormone is only produced in little amounts and is controlled by specific conditions, it will have no effect on height growth. It will be a short plant.
What is the dominant trait for height in pea plants?
tallness
Explanation. A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because tallness is the dominant trait. In F1 generation, the cross between TT and tt will result in all tall plants. Thus, tallness is the dominant trait.
Why are some plants tall and some short?
The height of a plant is dependent on it’s genetics.
A dominant allele which acts on the growth of the plant increases the action of the growth hormone, thus increasing it’s height. If the plant has a recessive allele for growth, the action of growth hormone is low and hence the plant is short in height.
Are tall or short pea plants dominant?
tall
In pea plants, tall (T) plants are dominant over short (t) plants. Complete the following crosses and give the genotypic and phenotypic ratios of offspring. Po 2. In pea plants, purple flowers (P) are dominant over white (p) flowers.
Why Mendel choose pea plant for his experiment Class 10?
Mendel choose pea plants for his experiments because of the following reasons: (i) The flowers of this plant are bisexual. (ii) They are self-pollinating, and thus, self and cross-pollination can easily be performed. (iii) The different physical characteristics were easy to recognize and study.
Why are the plants always tall when a tall pea plant is crossed with a short pea plant?
Why is the F1 progeny always of tall plants when a tall pea plant is crossed with a short pea plant? The progeny is not always tall, but most of the time tall because tallness is a dominant character and dwarfness is a recessive character. The ratio of tallness is to dwarfness is always 3:1 whenever they are crossed.
Which trait for plant height is recessive tall or dwarf?
Mendel found that if true-breeding Tall [T] plants are crossed (bred) with true-breeding short [t] plants, all the next generation of plants, called as F1, are all tall. It shows that tallness is the dominant trait.
What happens when pea plants showing two different characteristics?
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.
What was Mendel’s experiment with pea plants?
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 are some trees taller?
A tree’s height is also dictated by environmental conditions. Most trees are capable of being taller than they actually are, they’re just limited by deficiencies in light, water, or nutrients. The tallest trees on the planet are coast redwoods.
Who was the first to study inheritance?
Gregor Mendel
The way in which traits are passed from one generation to the next-and sometimes skip generations-was first explained by Gregor Mendel. By experimenting with pea plant breeding, Mendel developed three principles of inheritance that described the transmission of genetic traits, before anyone knew genes existed.
What do genetics do?
Genetics is the scientific study of genes and heredity—of how certain qualities or traits are passed from parents to offspring as a result of changes in DNA sequence.
When a tall plant is crossed with a short plant?
When a tall and short plant are crossed, all of the offspring are tall. If the offspring self-fertilize, they produce tall and short plants in a ratio of 3:1 in the next generation.
What law of inheritance is involved if a tall pea plant crossed with a short pea plant and produced all tall offspring?
Blending Theory of Inheritance
For example, a tall plant and a short plant had offspring that were either tall or short but not medium in height. Observations such as these led Mendel to question the blending theory.
What is the difference between a pure tall plant and a hybrid tall plant?
For example, pure breeding tall (TT) plant carries two copies of “T” allele and selfing of these plants produce a uniform progeny of tall plants only. Hybrids are the one which carries contrasting allele of a particular gene; for example, hybrid tall plant’s genotype is “Tt”.
Why did he choose pea plants?
(a) Reason for the selection of pea plants for the genetic experiments. Easy to grow in the garden. The flowers of pea plants are hermaphrodite, i.e flowers have bisexual characteristics. The generation time of pea plants is less.
What is the Law of Independent Assortment Class 10?
The Law of Independent Assortment states that during a dihybrid cross (crossing of two pairs of traits), an assortment of each pair of traits is independent of the other. In other words, during gamete formation, one pair of trait segregates from another pair of traits independently.
What is law of dominance Class 10?
Mendel’s law of dominance states that: “When parents with pure, contrasting traits are crossed together, only one form of trait appears in the next generation. The hybrid offsprings will exhibit only the dominant trait in the phenotype.” Law of dominance is known as the first law of inheritance.
When a pure tall TT pea plant is crossed with a pure dwarf TT pea plant the phenotypes of the F1 generation are?
Since, the parents are homozygous tall (TT) and dwarf (tt), the progeny of F1 generation will be hybrids (Tt).
When a pure tall pea plant is crossed with a pure short plant what offspring can be expected?
plant. What is the probability an offspring will show the DOMINANT TRAIT (PURPLE FLOWERS)? TT tt Make a cross between a HOMOZYGOUS TALL plant and a PURE SHORT plant. The offspring will have a 100% probability of having the genotype.
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