Chapter 12 Dna And Rna Answer Key
Explain Mendel's monohybrid progeny with the help of any one cross. Genetic disorders are not communicable diseases that would be transmitted to people who come in contact with people with genetic disoders. As a result, the chromosome has only one arm. You will also love the ad-free experience on Meritnation's Science And Technology Solutions Solutions. Chapter 12 dna and rna answer key lime. E. It is necessary for people to have their blood examined before marriage because the genetic disorders are transmitted only by reproduction.
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- Chapter 12 dna and rna answer key lime
- Dna rna and proteins worksheet answer key
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Dna And Rna Worksheet Answer Key Pdf
D. Chromosomes are mainly made up of DNA. As a result, it has one arm slightly longer than the other. Affected individual has short stature, small, round head, furrowed tongue, partially opened mouth, palm crease, congenital heart disease and mental retardation. A. Monohybrid cross is a cross between two parents that have one pair of contrasting characters; for example, if pea plant with yellow seed coat is crossed with pea plant having green seed coat then in the F1 generation all the plants produce yellow seeds. It is a result of replacement of GAG by GUG leading to the substitution of Glu by Val at sixth position of beta globin chain of haemoglobin. A. Chromosomes are thread-like structures found in the nucleus of all living cells. The total number of chromosomes in people affected with Down's syndrome becomes 47. 3) Acrocentric chromosomes: In acrocentric chromosomes, the centromere is located close to the end of the chromosome. 1) Metacentric chromosomes: In these chromosomes, the centromere is present in the middle, which gives rise to two equal arms. It can be used for studying evolution and genetic diversity in a population. Dna rna and proteins worksheet answer key. They play a structural and catalytic role during translation. • Many nucleotides are linked through 3'-5' phosphodiester linkages to each other to form the polynucleotide chain. Example- a cross between tall plant having red flower and a dwarf plant having white flower.
Chapter 12 Dna And Rna Answer Key Lime
Some of the examples of monogenic disorders are sickle cell anemia, cystic fibrosis, polycystic kidney etc. The applications of DNA fingerprinting are as follows: -. Chapter 12 dna and rna answer key figures. These solutions for Heredity And Variation are extremely popular among Class 9 students for Science Heredity And Variation Solutions come handy for quickly completing your homework and preparing for exams. Monogenic disorder||Pale skin, white hairs|.
Dna Rna And Proteins Worksheet Answer Key
C. DNA fingerprinting is a method for comparing the DNA sequences of any two individuals. Page No 193: Question 1: a. • A nitrogenous base is linked to the ribose sugar through N-glycosidic linkages to form a nucleoside (like adenosine, guanosine or cytidine and uridine). A dihybrid cross is useful in studying the assortment of the offspring. • The end of the chain which has a free phosphate moiety at 5'-end of ribose sugar is referred to as 5'-end and the other end of the chain having a free 3'-OH group at the ribose sugar is referred to as 3' -end of the polynucleotide chain. C. Sickle cell anaemia: Sickle-cell anaemia is an autosome-linked recessive trait exhibiting change in shape of the red blood cells from biconcave disk to sickle shape under low oxygen tension. Effect on blood-glucose level. There are 3 types of RNA: 3. rRNA (ribosomal RNA) − These are the work benches of translation. It is the remaining 0.
Chapter 12 Dna And Rna Answer Key West
Chapter 12 Dna And Rna Answer Key Figures
Monogenic disorder||Effect on blood-glucose level|. Genetic disorders are caused by changes in DNA sequences which can only be passed from one generation to another under specific circumstances. Question 7: Complete the tree diagram below based on types of hereditary disorders. It was the first discovered and described chromosomal disorder in humans. Leber hereditary optic neuropathy|| Mitochondrial. C. The component which is in the nuclei of cells and carries the hereditary characteristics is called chromosome. 44+XXY||Pale skin, white hairs|. What is meant by 'chromosome'. 4) Telocentric chromosomes: In telocentric chromosomes, the centromere is present at the terminal end. • A phosphate group is linked to 5'-OH of a nucleoside through phosphoester linkage to form a corresponding nucleotide.
It is characterised by low haemoglobin count and other symptoms of anaemia such as fatigue and irritability, swelling on hands and legs, pain in joints, constant low grade fever etc. Down's Syndrome: Down's syndrome is caused due to the presence of an additional copy of chromosome 21 (Trisomy of 21). C. |Monohybrid cross||Dihybrid cross|. Rather, we sholud support and accept people with such disorders, so that they can live a normal life.
Science And Technology Solutions Solutions for Class 9 Science Chapter 16 Heredity And Variation are provided here with simple step-by-step explanations. D. A RNA nucleotide has three main components − a nitrogenous base, a ribose sugar and a phosphate group. As a result, it has one arm, which is extremely long and the other, which is extremely short. All questions and answers from the Science And Technology Solutions Book of Class 9 Science Chapter 16 are provided here for you for free. 44+X:Turner syndrome::44+XXY:-.............. B. DNA is a very large single molecule also called as macromolecule. There is no particular treatment for sickle cell anemia, the treatments which are available provide symptomatic relief from the symptoms associated with this disorder. The DNA molecule is made up of basic materials called nucleotides and each nucleotide is made up of three components: - Sugar. The cross in which only two pairs of contrasting characters are involved is known as dihybrid cross. B. Dihybrid cross is a cross between two parents that have two pairs of contrasting characters, for example, a plant having round and yellow seeds is crossed with a plant having green and wrinkled seeds.
A monohybrid cross is useful in determining the dominance of genes. B. Monogenic disorders: Monogenic disorders are genetic disorders which are caused by a mutation in a single gene. Chromosomes are divided into four types based on the position of the centromere. It has a double helix structure, similar to a ladder, which is twisted at both ends. 1% that makes every individual unique. 9% of the base sequences in all human beings are identical. If a carrier/sufferer of a genetic disorder marries a person who is also a carrier/ sufferer of the disorder, then there are chances that disorder will be passed on to the offsprings. This mutation may be present on one or both the chromosomes. All Science And Technology Solutions Solutions for class Class 9 Science are prepared by experts and are 100% accurate.