Pedigree charts are used to trace the passing out of traits(characteristics) through generations.
In the given pedigree of 5 generations, the pattern of inheritance of genetic abnormality of polydactyly(extra fingers in hands and toes) is studied . The types of pattern of inheritance in traits over generations.
(a) Genotype of the parents for the trait Polydactyly in generation 1
Since each parent provide one allele of each trait to the offspring there are dominant and recessive genes on the basis of the expression of the character or trait. The genotype of the parents for thre trait of polydactyly in generation 1 is Recessive. Because both the parents do not have the abnormality and their offspring shows(expresses) the trait.
(b) In humans there are 46 chromosomes arranged as 23 sets of 2 chromosomes in a cell which is described as (2n). These somatic cells undergo Mitotic division to produce 2 identical daughter cell with 2n chromosomes and they are called diploid cells. When Meiosis takes place one cell is divide into 4 Haploid cells with 23 chromosomes each, ie, the single set of chromosomes represented by n. These Haploid cells are the gamates which transfer the genetic information from parents to offspring. The gamates are 2 types the sperm and egg cells , both are haploid and during fertilization a sperm cell fuses with eggcell to form a zygote with 2n (46) chromosomes.
To learn more about chromosomes check the link below:
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Explanation:
Corporate Culture- The values, norms, and other orientation that characterizes corporate work settings.
Hidden Corporate Culture- Stereotypes of the traits that make for high-performing and underperforming workers
3.Explain why individuals in a population have different observable traits. Use your observation skills to find two examples of traits that you have inherited. These traits must be different from the ones that are discussed in the lesson.
Genes are composed of a sequence of nucleotides that code for a functional protein, straddled between a start and stop codon and are regulated by a promoter and regulator upstream. DNA, on the other hand, is a sequence of deoxyribonucleotides in an antiparallel double-helix chain. Genes are contained in the DNA double helix. Chromosomes are long DNA strands that are we packaged to into the small of the nucleus in a cell. The chromosomes contain packaging proteins such as histones in which DNA is wound to form nucleosomes.
This is because a population has different alleles (varying forms) of a gene distributed across the population in different frequencies. These alleles are passed down generation by parents to offspring. Each parent gives one allele to its offspring in diploid organisms. The difference in traits is because of this variation in the genotype of an organism. Additionally, how this genotype interacts with the environment to give the individual his phenotypic trait also give individuals varying traits.
An example of such a trait is my wavy hair, an observable trait I have because one of my parents has straight hair while the other has curly hair. I inherited an allele from both parents for hair texture. Since both allele exhibit incomplete dominance, I, therefore, have wavy hair.
Answer:
C. a haploid cell produced by meiosis
Answer: Double Helix model of DNA
Explanation: Which description best explains Watson and Crick's DNA model?. A:DNA single stranded molecule that has nitrogenus base towards its exterior . . B:DNA is a double-helix made of 2 strands linked together with hydrogen bonds . C:DNa is a double-helix that contains nitrogenious bases towards its exterior.
The double Helix model of DNA proposed by Watson and Crick is the most widely accepted model for the structure of the DNA. It features a right-handed double stranded polynucleotide DNA with molecules spirally twisted around each other and coiled around a common axis. Consisting of two sugar-phosphate backbones on the outside, it is bounded together held by hydrogen bonds between pairs of four nitrogenous bases (A, C, G and T) on the inside with pairing occurring always between A and T and, C and G.
The biosphere will sustain when the inflow of additional carbon atoms is low due to ecosystem services.
The ecosystem services refers to the deteritous activity done by the microbes present in the soil which convert the soil organic matter into available carbon dioxide to the environment.
Hence, the biosphere will receive the flow of carbon atoms by the activity of deteritous.
Learn more about microbes:
Answer:
The oxygen and carbon dioxide in the lower layers of the troposphere (that touches Earth) allow life to exist as organisms can respire and plants can photosynthesise. The atmosphere also helps to keep the Earth warm by trapping solar energy.
Explanation:
Answer:
50%
Explanation:
If the male has a cleft chin, that means that his chromosomes is Aa. His wife must be aa.
Female Female
Male Aa Aa
Male aa aa
With Aa, the child will have a cleft chin. With aa, the child will not. So the probability is 50%.