a. Trisomy of 21st Chromosome b. XXY c. XO Solution: Aneuploidy occurs when chromatid segregation fails during the cell division cycle, resulting in the gain or loss of a chromosome(s). Polyploidy...

Solution: Hunt, Thomas Morgan and his colleagues carried out multiple dihybrid crosses of drosophila to examine the sex-linked genes and experimentally proved the theory of inheritance. Example:...

Solution: Color blindness is a disorder that can be handed down through the generations .

b. Also describe as to, who determines the sex of an unborn child? Mention whether the temperature has a role in sex determination. Solution: Humans have XY chromosomes that determine their gender....

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Solution: The human population still has sickle cell anaemia. It affects people who have mutations in both their maternal and paternal haemoglobin genes. The patients are more protected against...

Solution: It creates a combination of the expression of two alleles in partial dominance, and the F1 does not resemble either of the parents. Flower colour in a dog flower is an example. There is no...

Solution: Recombination is the process of creating non-parental gene combinations through cross-over or independent selection. Alfred Sturtevant calculated the distance between gene pairs on the...

Solution: 1. It both occurs in pair 2. Genes and chromosomes separate during gamete development, and one of each pair is passed to a gamete. 3. The pairs will independently separate each...

Solution: Because it is a simple synthetic medium that can be cultivated in the laboratory, Drosophila has been utilised extensively for genetic studies. A single mating can result in a vast number...

Solution: Color blindness is a frequent genetic illness, meaning it is handed down from one generation to the next. When a father is colorblind, his daughter can only inherit an X chromosome. As a...

Tall, Red = 138 Tall, White = 132 Dwarf, Red = 136 Dwarf, White = 128 Mention the genotypes of the two parents and the four offspring types. Solution:

Solution: It boosts the organism's homozygozity. Through deletion, this also aids in the elimination of dangerous recessive genes. As a result, it encourages the accumulation of superior genes.

Solution: Incomplete dominance is the inheritance. F1 had a phenotype that was in between the parent plants and did not resemble either of them.

Solution: Morgan confirmed Mendelian inheritance laws as well as the fact that genes are found on the same chromosomes. In Drosophila, he discovered that eye colour was a sex-linked feature....

Solution: The presence of an extra copy of chromosomal number 21 (9trisomy of 21) causes Down syndrome. 23 pairs of autosomes and 1 pair of sex chromosomes make up the karyotype. (There are a total...

Solution: Yes, a child can have blood group O if both of his parents have blood groups A and B. The gene I controls ABO blood grouping in humans. IA, IB, and I are the three alleles of the gene (I)....

Solution: Starting with homozygous dominant and homozygous recessive parents in a monohybrid cross, F1 with partial dominance can show identical genotypic and phenotypic ratios.

Solution: A mutagen can alter the alignment and content of nitrogen bases in DNA, resulting in a different gene product and therefore mutation.

Solution: A diploid organism has more than two alleles, and each character has two alleles. Multiple alleles can be discovered in population research.

Solution: The tiny grain size produced by a double recessive allele is the genetic basis for the wrinkled phenotype of pea seed.

Solution: The father, not the mother, determines the baby's sex. The X chromosome is carried by 50% of sperm while the Y chromosome is carried by 50% of sperm. After fusing, the zygote has XX or YY...

Solution: The given cross is Aa bb DD X aa bb dd. Hence the offspring’s would be:

Solution: Individual phenotype is the product of the interaction of environment and genotype. Phenotype = Genotype + Environment

Solution: Mendel obtained only red-flowered plants with genotype Rr by crossing red (RR) and white (rr) flowering plants. This is the first hybrid generation's filial progeny (F1) or plants. F1...

Solution: Homozygous means that the allelic pairings of a gene are same, whereas heterozygous means that the allelic pairs of a gene are different. A dominant factor is one of two distinct factors,...

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Solution: Because of true breeding, Mendel pollinated a pure-breeding tall plant with a pure-breeding dwarf plant to produce the F1 generation. Half of the kids of a genotype resemble one parent,...

Solution: According to the pedigree, both parents are carriers, and only a handful of the kids exhibit the feature that is gender agnostic. The other could be normal or a carrier.

Solution: True breeding is the criterion for selecting the organisms.

Solution: 1. Selection of parents with desired characters 2 Emasculation and bagging procedures protect the stigma against contamination (unwanted pollen grains). Cucurbits are monoecious...

Solution: Even if the characteristics were on the same chromosome, Mendel's rules of inheritance would not have been different because Mendel's laws of inheritance would not have been different even...

The Test cross is a cross between F1 progeny (that is, F2 generation) and a homozygous recessive parent that is used to determine the genotype (genetic makeup) of a plant whose phenotype (visible...

group, respectively. What would be the genotype of both mother and father? a. Mother is homozygous for ‘A’ blood group and father is heterozygous for ‘B’ b. Mother is heterozygous for ‘A’ blood...

phenotypes and genotypes are: a. phenotypes – 4; genotypes – 16 b. phenotypes – 9; genotypes – 4 c. phenotypes – 4; genotypes – 8 d. phenotypes – 4; genotypes – 9Solution: Option (d) is the...

genes, the F1 heterozygote is crossed with the homozygous recessive parental type (aa bb). What would be the ratio of offspring in the next generation? a. 1: 1 : 1: 1 b. 9 : 3 : 3: 1 c. 3: 1 d. 1: 1...

is discrete and independent. His proposition was based on the a. results of the F3 generation of a cross. b. observations that the offspring of a cross made between the plants having two contrasting...

studied by the pedigree analysis. Character studied in the pedigree analysis is equivalent to: a. quantitative trait b. Mendelian trait c. polygenic trait d. maternal trait Solution: Option (b) is...

have 18 chromosomes. The 17 and 18 chromosome-bearing organisms are: a. males and females, respectively b. females and males, respectively c. all males d. all females Solution: Option (a) is the...

the phenomenon is called: a. multiple allelism b. mosaicism c. pleiotropy d. polygeny Solution: Option (c) is the answer.

on the: a. non-homologous chromosomes b. homologous chromosomes c. extranuclear genetic element d. same chromosome Solution: Option (b) is the answer.

a. Independent assortment of genes b. Crossing over c. Linkage d. Mutation Solution: Option (c) is the answer

a. The alleles of two genes are interacting with each other b. It is a multigenic inheritance c. It is a case of multiple allelism d. The alleles of two genes are segregating independently Solution:...

plants. What would be the genotypes of both the parents? a. TT and Tt b. Tt and Tt c. TT and TT d. Tt and tt Solution: Option (b) is the answer.

a. Platypus b. Snails c. Cockroach d. Peacock Solution: Option (d) is the answer.

because of: a. Pleiotropy b. Co-dominance c. Segregation d. Incomplete dominance Solution: Option (b) is the answer.

the following triplets codes for valine? a. G G G b. A A G c. G A A d. G U G Solution: Option (d) is the answer.

female to only some of the male progeny, the disease is: a. Autosomal dominant b. Autosomal recessive c. Sex-linked dominant d. Sex-linked recessiveSolution: Option (d) is the answer.

a. a direct relationship b. an inverse relationship c. a parallel relationship d. no relationship Solution: Option (a) is the answer.

a. Aneuploidy b. Polyploidy c. Allopolyploidy d. Monosomy Solution: Option (a) is the answer.

a. Form different groups depending upon their relative distance b. Form one linkage group c. Will not from any linkage groups d. Form interactive groups that affect the phenotype Solution: Option...