If the lethal gene is recessive, and the parent carrying it is heterozygous for that gene, it can be passed down to offspring in the recessive form. If the mate of the parent happens to be carrying the same gene heterozygously, 50% of offspring will be expected to inherit the recessive lethal gene heterozygously. 25% of the offspring will be expected to inherit the lethal gene homozygously, leading to death. The remaining 25% of offspring we will expect to homozygously inherit the non-lethal gene. 1:2:1 ratio
Mutations can be lethal due to the fact that different defects affect different functions of an organism. If this organism which the mutation affects is vital for survival, it is more than likely that this mutation will result as fatal. For example, a mutation that affects the production of enzymes. Without enzymes, your body would not have mechanisms of defence, or storage. Mutations are potentially dangerous, but some may end up being rather benefical!
A lethal allele results in actual fatality if it is the dominant or only allele in an organism's genotype.
Most lethal alleles are recessive, however, so they are rarely expressed in an organism and get masked by a dominant allele, resulting in the nonlethality of that gene. (i.e. something else covers them up, so the gene isn't lethal and the organism suvives). Hence, such an allele can be passed on for many generations before actually being expressed in offspring.
When it is recessive and masked by a dominant allele. At least until it become homozygous recessive.
Dominant = L
recessive = l
Ll = masked
ll = homozygous recessive
deterious recessive gene
A lethal dominant gene prohibits the organism from reproducing irregardless of the paired gene, so it is removed from the gene pool as soon as it appears. A lethal recessive gene, on the other hand, does not prevent reproduction unless it is paired with another lethal recessive, so it may be passed down through many generations before becoming paired and preventing reproduction.
When lethal genes are present in the organism's chromosomes, the organism is unable to survive. Semi Lethal genes are harmful to the organism but does not cause Death. E.g Huntington Chorea in human
A gene whose phenotypic expression is masked by the presence of another is generally called the recessive gene. However, it can still be passed onto offspring.
Recessive
a woman who is heterozygous for the gene
deterious recessive gene
A mutation can be called a deformity, because a mutation is passed on, it is like a gene being passed down the pedigree, and in the pedigree there can be a deformity that will be passed on to the next generation. :.
A lethal dominant gene prohibits the organism from reproducing irregardless of the paired gene, so it is removed from the gene pool as soon as it appears. A lethal recessive gene, on the other hand, does not prevent reproduction unless it is paired with another lethal recessive, so it may be passed down through many generations before becoming paired and preventing reproduction.
The duration of The Gene Generation is 1.6 hours.
The Gene Generation was created on 2007-09-27.
When lethal genes are present in the organism's chromosomes, the organism is unable to survive. Semi Lethal genes are harmful to the organism but does not cause Death. E.g Huntington Chorea in human
a lethal gene
Temporary expression of a transformed gene (gene of interest) in the desired target cells over a relatively brief time span; does not necessarily indicate integration of the gene into the host chromosome and is not passed onto the next generation
i think, heredity works on the structure of the genes.. whatever experiance, tribulation or situation a person is under going is stored in his or her gene with or with out his knowing. this same gene is passed to the next generation.....
There are some medical reports that cancer can be passed through your gene lines. But, the research also suggest that it can miss a generation or be completely random in it's activation along the gene line.
Hi, Chromosome are structure within cells which contain genetic information that is passed from one generation to other generation. Gene is a section of chromosome. A Gene carried coded information within sequence of chemicals. When needed particular information is decoded and used to provide for protien synthesis within the cells. Deoxy-ribo-nucleic(DNA) is the chemical which carries the genetic code.