what are Lethal effects of homozygosity for a deletion

Q: Familial Down syndrome is similar to primary Down syndrome in that it is caused by trisomy 21.…

A: Two normal copies of 14, two normal copies of 21: A.Two normal copies of 21, one normal copy of 14:…

Q: Do none coding triplets perform any function? Give examples

A: Non coding sequences are those which do not code for amino acids .

Q: True or False On Average, half of the gametes produced by one or more crossovers between non-sister…

A: Recombination is the process by which meiosis produces gametes with different allelic combinations…

Q: What does the expression wild type mean?

A: Genetic traits are regulated by genes.

Q: To detect the CAG repeat expansion with a particular gene where 30 repeats in Normal changes to 250…

A: Hi! Thank you for the questions. As you have posted multiple questions, I will be answering the…

Q: For the following chromosome complements, what is the phenotypic sex of a person who has Q. XO with…

A: The male sex-determining gene in human is termed as the sex determining region Y (SRY) gene.…

Q: Explain how it is possible for a person with a translocationor an inversion to be phenotypically…

A: Chromosomes are the condensed packaged structure of the genetic material of an organism. The…

Q: What is pseudoagouti (highly methylated) phenotype ?

A: Phenotype generally refers to the observable characteristics of an organism. It is generally…

Q: Define the Random Monoallelic Expression: Inactivation of the X Chromosome ?

A: They were discovered in 1876. These are the tertiary structures of DNA (deoxyribonucleic acid)…

Q: Give the phenotypic effects and chromosomal aberrations of the following syndromes/disorders: Down…

A: DOWN SYNDROME. Down syndrome is the most common chromosomal disorder due to the autosomal trisomy of…

Q: explain the symptoms of Robertsonian translocation?

A: Robertsonian translocation is a type of translocational chromosomal aberration in which acrocentric…

Q: How do translocations in which no genetic information is lost or gained produce phenotypic effects?

A: Translocation is caused Due to separation of a chromosome segment and its union to a nonhomologous…

Q: Name the type of translocations and explain their mechanism of occurrence.

A: Translocations were discovered for the first time in the late nineteenth and early twentieth century…

Q: Typically, most of the nucleotide variability that occurs within a geneticlocus does not affect the…

A: The total number of genetic traits present in the genetic composition of a species is known as…

Q: Referring to Figure 17-19, draw a diagram showing the process whereby an inversion formed from…

A: An inversion is a type of chromosomal rearrangement in which a chromosomal segment is reversed end…

Q: In dosage compensation, do males sometimes overcompensate or is it always Barr body X-chromosome…

A: Dosage compensation is the process by which the organisms equalizes their genetic expression between…

Q: why why heterozygosity for a deletion can be harmful?

A: Deletion refers to a type of mutation in which the genetic material in a chromosome is deleted or…

Q: explain the Phenotypic effects of duplications

A: Duplication of chromosome refers to an addition of an extra chromosomal arm attached to a…

Q: The Klinefelter syndrome (disomy of the X chromosome in males) is a genetic disease caused by…

A: The normal humans contain 46 chromosomes. Between these 46 chromosomes, 44 are autosomes and 2 are…

Q: What gametes, and in what frequencies, are produced by a female Drosophila of genotype A B / a b…

A: Drosophila, sometimes known as fruit flies, has been used as a model organism in genetic study for…

Q: Two related forms of muscular dystrophy—Duchenne muscular dystrophy (DMD) and Becker muscular…

A: Muscular dystrophies cause muscle weakness and atrophy in the skeletal muscles exclusively in males.…

Q: There is growing support for the idea that as we warm the planet and spread fresh water over the…

A: Global warming is about the gradual process of heating of Earth's surface, oceans, and atmosphere,…

Q: the deletion of which chromosome causes obvious morphological and mental defects in the organism,…

A: Cri-du-chat syndrome, otherwise called 5p-(5p minus) syndrome or cat cry syndrome, is a chromosomal…

Q: Why dominant negative mutation shows the haploinsufficiency  ?

A: A mutation is a change that occurs in our DNA sequence, either due to mistake when the DNA is copied…

Q: Two phenotypically unaffected parents produce two children with familial Down syndrome. Regarding…

A: A phenotype is the observable physical and functional traits of an organism which result from the…

Q: What is the spreading phase of X-chromosome inactivation? Whydo you think it is called a spreading…

A: Heterochromatization of one X chromosome begins in the late blastocyst stage of the embryonic life.…

Q: Explain why inversions and reciprocal translocations do not usually cause a phenotypic effect. In a…

A: in this, no addition or removal of genetic material is done there is a relative change in the…

Q: What is a Robertsonian translocation?

A: Translocation can be defined as the movement of deoxyribonucleic acid (DNA) sequences in between two…

Q: Robertsonian translocation is  balanced or unbalanced?

A: "Robertsonian translocation" is a type of translocational chromosomal aberration in which…

Q: Why must the carrier of a genetic disease be heterozygous?

A: Homozygous means a person carries two identical pair of the gene whereas heterozygous means the…

Q: For the following chromosome complements, what is the phenotypic sex of a person who has Q. XX with…

A: The sex-determining region Y (SRY) is located on the short branch of the Y chromosome, which…

Q: Explain why unequal crossing over always produced a duplication and deletion at the same time, not…

A: Crossing over occurs in the first division of meiosis at this stage each chromosome has replicated…

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Substance abuse refers to the use of illegal drugs in excessive quantities, as well as the misuse of legal substances such as prescription or over-the-counter pharmaceuticals or alcohol for purposes other than those intended. Drug addiction, also known as substance use disorder, is a disease that affects the brain and behavior of a person. It leads to a failure to control the use of any drug or prescription, legal or illegal.