recessive lethal

A gene that has a lethal effect when present in both loci (homozygous).

Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

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short rib-polydactyly syndrome type 2

References in periodicals archive ?

Selection is multiplicative across loci, so that a genotype with i heterozygous recessive lethal mutations has a relative fitness of [Mathematical Expression Omitted], where h is the dominance coefficient and the mean fitness in the population.

Inbreeding depression under joint selfing, outcrossing, and asexuality

If inbreeding depression is the product of recessive lethal and deleterious alleles that are maintained by mutation-selection balance, then inbreeding depression at equilibrium should decline with increased inbreeding (Lande and Schemske 1985; Charlesworth and Charlesworth 1987; Waller 1993).

Evolution of the magnitude and timing of inbreeding depression in plants

According to the partial-dominance hypothesis, the cause of lower fitness of progeny derived from inbreeding as compared with outcrossing is the exposure of recessive or nearly recessive lethal and deleterious mutations in the inbred offspring.

Geographical variation in the inbreeding depression of Scots pine

Theory suggests that in a large population the component of inbreeding depression maintained by nearly additive, mildly deleterious mutations, or genetic variance in quantitative characters, is difficult or almost impossible to purge by inbreeding, but that the recessive lethal component of inbreeding depression is effectively purged by a low rate of self-fertilization (Lande and Schemske 1985; Charlesworth and Charlesworth 1987; B.

High inbreeding depression, selective interference among loci, and the threshold selfing rate for purging recessive lethal mutations

The genetic basis of x-rays induced recessive lethal mutations.

A method for accurately estimating social spider numbers without colony damage

Meckel Gruber syndrome is a rare autosomal recessive lethal disorder with wide spectrum of clinical manifestations.

Meckel Gruber Syndrome: a case report with emphasis on importance of antenatal diagnosis

To investigate how many recessive lethal mutations are carried by humans on average, Ziyue Gao, a graduate student in the Genetics, Genomics and Systems Biology program, and her colleagues worked closely with a group of Hutterites, a religious community that settled in North America in the 1870s.

Recessives from both parents can be Lethal

DMD is the most common X-linked recessive lethal disease, with an incidence of approximately 1 in 3500 newborns (1).

Duchenne muscular dystrophy diagnostics: it only gets better but some of the same challenges remain

"We don't yet understand why the number of recessive lethal mutations might be relatively constant across distantly related organisms," said Gao.

Hidden Burden: Most People Carry Recessive Disease Mutations

(2011) identified five recessive lethal haplotypes in three cattle breeds.

COMPARING DIFFERENT STRATEGIES IN REDUCING THE ECONOMIC IMPACT OF RECESSIVE GENETIC DISORDERS AFFECTING REPRODUCTIVE EFFICIENCY IN DAIRY CATTLE: A SIMULATION STUDY

If a "recessive lethal mutation" is defined as a mutation that results mainly in the premature death of homozygous individuals, sickle cell anemia is a recessive lethal condition.

Who first reported a genetic disease?

However, it is not yet known whether the genetic load revealed by inbreeding is composed primarily of genes that would respond readily to that selection (such as recessive lethal alleles), primarily of genes that would not respond readily to selection (such as a genes showing overdominant fitness effects or genes with individually small effects), or different genetic bases in different populations.

Effectiveness of selection in reducing the genetic load in populations of Peromyscus polionotus during generations of inbreeding