When two genes are located on the same chromosome,what is the physical basis for the production of recombinant offspring in a testcross between a dihybrid parentand a double-mutant (recessive) parent?

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

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

Q: In a testcross for two genes, what types of gametes are produced with (a) complete linkage, (b)…

A: Testcross is a breeding of an individual with homozygous recessive individual. The aim is to…

Q: If 2 spot (S) is dominant to 4 spot (s), give the genotypes for the parents in the following…

A: Different versions of a gene are called alleles.  Alleles are described as either dominant or…

Q: If a male bird that is heterozygous for a recessive Z-linked mutation is crossed to a wild type…

A: The condition where two identical genes are present in an individual for a particular character, is…

Q: The trihybrid AaBbCc is crossed to the triple recessive, aabbcc, and the following  phenotypes are…

A: Here, The offspring are obtained as follows: abc = 64 ABC = 71  ABc = 3 abC = 2  aBc = 11  aBC = 18…

Q: A female with an aa bb cc dd genotype is crossed with a male with an Aa Bb Cc Dd genotype. What is…

A: To answer this question, convert the given tetrahybrid cross into 4 monohybrid crosses.

Q: Why is a testcross unnecessary to determine whether a snapdragon with red flowers is homozygous or…

A: A test cross is defined as an experimental cross where one of the organisms has a recessive…

Q: What is meant by test cross and how is it significant to genetics?

A: The branch of biology that deals with the study of genes, heredity and genetic variations are termed…

Q: What ratio of genotypes to phenotypes is observed in a two-point test cross if genes are unlinked?

A: A test cross is performed between a dominant and a recessive phenotype to determine the zygosity,…

Q: Which of the karyotypes shown is from a normal female?

A: A karyotype represents all the 23 pairs of chromosomes in a picturized form. It provides information…

Q: How many different types of gametes can be formed by individualsof the following genotypes? What are…

A: BASIC INFORMATION  COMMON TERMS USED IN GENETICS  HETEROZYGOUS - Every gene has two characters one…

Q: In the F2 generation of this cross, 224/300 embryos develop into wild-type flies, while 76/300 of…

A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…

Q: Two genes are located on the same chromosome and are known tobe 12 mu apart. An AABB individual was…

A: The two genes A and B are located 12 map units apart on the same chromosome. The AABB individual is…

Q: A different walnut rooster was crossed to a rose hen, and all the progeny were walnut. What are the…

A: The comb of a rooster or chicken is referred to as a fleshy structure that grows on top of the head.…

Q: What would be the genotypic and phenotypic outcome if each parent was self-fertilized?

A: Genotype is refer to a gene or set of genes that leads to a single trait. Phenotype is refers to the…

Q: Suppose a design problem was coded with 5 genes on a single chromosome, and single-point crossover…

A: During cell division, the genetic material of the cells stored in the chromosomes aligns together.…

Q: In your own words, explain why a testcross cannot produce more than 50% recombinant offspring. When…

A: The external appearance of an individual for any trait is called phenotype for that trait. For…

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: How can the chromosome number of an individual be tested before he or she is born?

A: Genetics is a part of science worried about the investigation of genes, genetic variety, and…

Q: When roan cattle are mated, 25% of the offspring are red, 50% are roan, and 25% are white. Upon…

A: Given example shows codominance inheritance. In codominace inheritance, both the genes expressed for…

Q: If the heterozygous tall pea plant is crossed with a short pea plant, what are the possible…

A: Note: As per the guidelines, the first 3 MCQs are answered, please repost the rest question to get…

Q: If the blue F1 females in are backcrossed to the blue males in the P generation, what phenotypes and…

A: Genotype is the genetic constitution of an individual organism. Phenotype is the observable…

Q: in guinea pigs, rough coats (with lots of swirly cowlicks) are dominant over smooth coats. If an RR…

A: From the monohybrid cross, Mendel’s law of segregation was given. According to this law, when two…

Q: If two loci are 10 cM apart, what proportion of the cells in prophase of the first meiotic division…

A: * Given that two loci are 10cM apart (centimorgan) *Have to calculate the proportion of cells in…

Q: What are matings between the F1 progeny of pure-breeding parents that differed in 3 or more…

A: Genes are known as the unit of heredity. Genes influence the outcome of organisms characteristics.…

Q: in a cross AaBb X aabb, the following progeny were obtained: AaBb=50 aabb=46 Aabb=7 aaBb=6  What is…

A: Linkage is defined as occurrence of two or more than two genes on the same chromosomes. The genes…

Q: A three-point testcross is carried out between three linked genes. The resulting nonrecombinant…

A: Three-point cross is the cross that is used in genetics for the determination of the loci of three…

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

A: A gene is a unit of genetic material present within the DNA (deoxyribonucleic acid). Each gene…

Q: The order of the genes on a plant chromosome is A, B, C, where A and B are located 10 cM apart and B…

A: Genes A and B are located 10 cM apart and B and C are located 3cM apart. Hence, S.C.O for A and B =…

Q: Which of the karyotypes shown is from a normal female?

A: Karyotyping is the process of taking micro pictures of human chromosomes to understand their nature…

Q: Suppose gene D and gene E are linked. If a DdEe parent produces 40% De gametes, 42% dE gametes, 8%…

A: Genetic distances It is the distance between two or more than gene loci on a single chromosome which…

Q: In a three-point testcross, the nonrecombinant progeny are A+ B+ C+ and a b c. The double- crossover…

A: "Genes" are the fundamental unit of heredity. They store genetic information in the form of DNA,…

Q: In a species of dog, a mutant gene that causes deafness is found on the Y chromosome. What type of…

A: The sex chromosome of dog is XY (Male) and XX (Female). The mutant gene of Y-chromosome is…

Q: Cross a heterozygous freckled man with a nonfreckled woman. What are the genotypes and phenotypes of…

A: Gene expression

Q: What is the cross between the progeny of F1 and the homozygous reccessive parent called? How is it…

A: Introduction  Monohybrid cross deals with one character controlled by one pair of alleles such as…

Q: If a crossover began in the short region between gene A and the tip of the chromosome, would this…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: What is the difference between polygeny and pleiotropy?

A: Biological inheritance, also called heredity, is the process by which different traits are passed on…

Q: Alleles A and a reside at a locus on the same chromosome as a locus with alleles B and b. Aa Bb is…

A: Recombination frequency is the frequency of crossing over occurring between two genes present on a…

Q: Why are some crosses not performed in a complementation matrix?

A: Complementation is the capacity of 2 mutants in combination to reinstate the normal phenotype. The…

Q: How many different gamete genotypes are produced in a four-gene cross with incomplete genetic…

A: If the linkage is complete, there should be parental combinations only and no recombination.…

Q: based on fig 1. Is this karyotype a male or female? Is there a chromosomal disorder? What type of…

A: Karyotype --  is complete collection of chromosomes of a person it may be a male or female karyotype…

Q: What would be the chromosome number of progeny resulting from the following crosses in wheat? What…

A: The complete chromosome sets present in the cells of an organism is referred to as ploidy. Humans…

Q: How many different kinds of F1 gametes, F2 genotypes, and F2 phenotypes would be expected from the…

A: Genotype  The genetic constituent of an organism is known as genotype.

Q: In com, male sterility is controlled by maternal cytoplasmic elements. However, the presence of  a…

A: Cytoplasmic male sterility is a phenomenon in which interactions between mitochondrial and genetic…

Q: If two genes on the same chromosome exhibit complete linkage, what is the expected F2 phenotypic…

A: ANSWER;- Here each parent produces 2 types of gametes, a+b+, and ab, giving the simple Mendelian…

Genome annotation

The technique of linking biological information to genome sequences is termed genome annotation. Gene annotation is the method of identifying gene locations and coding sections. It helps us understand what these genes are doing in the body through establishing structural characteristics and linking them to the actions of various proteins.