Dna And Rna Worksheet Answer

The total number of chromosomes in people affected with Down's syndrome becomes 47. 2) Sub-metacentric chromosomes: In sub-metacentric chromosomes, the centromere lies slightly away from the middle region. It was the first discovered and described chromosomal disorder in humans.

Dna Rna Worksheet Answer Key

All questions and answers from the Science And Technology Solutions Book of Class 9 Science Chapter 16 are provided here for you for free. Genetic disorders are caused by changes in DNA sequences which can only be passed from one generation to another under specific circumstances. C. The component which is in the nuclei of cells and carries the hereditary characteristics is called chromosome. Chapter 12 dna and rna answer key. You will also love the ad-free experience on Meritnation's Science And Technology Solutions Solutions. Nitrogen bases are attached sugar from inwards that extends to join hydrogen bond and the complimentary nitrogenous base from other strand. Example- a cross between tall and dwarf plant||. • A phosphate group is linked to 5'-OH of a nucleoside through phosphoester linkage to form a corresponding nucleotide.

Chapter 11 Dna And Genes Answer Key

Question 5: How are the items in groups A, B and C inter-releated? E. It is necessary for people to have their blood examined before marriage because the genetic disorders are transmitted only by reproduction. C. |Monohybrid cross||Dihybrid cross|. As a result, the chromosome has only one arm. C. DNA fingerprinting is a method for comparing the DNA sequences of any two individuals. All Science And Technology Solutions Solutions for class Class 9 Science are prepared by experts and are 100% accurate. Chapter 12 lab extracting dna answer key. • Two types of nitrogenous bases are present i. e. Purines (Adenine and Guanine) and Pyrimidines (Cytosine and Uracil).

Chapter 12 Lab Extracting Dna Answer Key

Rather, we sholud support and accept people with such disorders, so that they can live a normal life. It is the remaining 0. Explain Mendel's monohybrid progeny with the help of any one cross. 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. There is no particular treatment for sickle cell anemia, the treatments which are available provide symptomatic relief from the symptoms associated with this disorder. Chapter 11 dna and genes answer key. 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. Question 7: Complete the tree diagram below based on types of hereditary disorders. 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. Some of the examples of monogenic disorders are sickle cell anemia, cystic fibrosis, polycystic kidney etc. As a result, it has one arm slightly longer than the other. What is meant by 'chromosome'.

Chapter 12 Dna And Rna Study Guide Answer Key

3) Acrocentric chromosomes: In acrocentric chromosomes, the centromere is located close to the end of the chromosome. 44+XXY||Pale skin, white hairs|. Hereditary characters are transferred from parents to offsprings by gene, hence they are said to be structural and functional units of heredity. Page No 193: Question 1: a. B. DNA is a very large single molecule also called as macromolecule. E. Organisms produced through sexual reproduction show major variations. Science And Technology Solutions Solutions for Class 9 Science Chapter 16 Heredity And Variation are provided here with simple step-by-step explanations. 44+XXY||Men are sterile|. It can be used for studying evolution and genetic diversity in a population. DNA fingerprinting forms the basis of paternity testing since a child inherits polymorphism from both its parents. 9% of the base sequences in all human beings are identical.

Chapter 12 Dna And Rna Answer Key

D. Chromosomes are mainly made up of DNA. D. No, it is not right to avoid living with a person suffering from a genetic disorder. Diabetes||Polygenic disorder||. Affected individual has short stature, small, round head, furrowed tongue, partially opened mouth, palm crease, congenital heart disease and mental retardation. As a result, it has one arm, which is extremely long and the other, which is extremely short.

Example- a cross between tall plant having red flower and a dwarf plant having white flower. Klinefelter syndrome. The cross in which only two pairs of contrasting characters are involved is known as dihybrid cross. Leber hereditary optic neuropathy|| Mitochondrial. 1) Metacentric chromosomes: In these chromosomes, the centromere is present in the middle, which gives rise to two equal arms. View NCERT Solutions for all chapters of Class 9. 44+X:Turner syndrome::44+XXY:-.............. Monogenic disorder||Effect on blood-glucose level|. The applications of DNA fingerprinting are as follows: -. • The ribose sugar and the phosphates form the backbone of a polynucleotide chain with nitrogenous bases linked to sugar moiety and projecting from the backbone. 1% that makes every individual unique. 4) Telocentric chromosomes: In telocentric chromosomes, the centromere is present at the terminal end. A monohybrid cross is useful in determining the dominance of genes.
• Every nucleotide residue has an additional −OH group present at 2' -position in the ribose. 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. A. Chromosomes are thread-like structures found in the nucleus of all living cells.
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