Search results
Results from the WOW.Com Content Network
The Population Reference Bureau (PRB) Country ranking and comparison by TFR: 1970 and 2013 list is sourced and based on the data of the 2014 World Population Data Sheet, [16] which was published online. [17] [18] Forecast/prediction ranking lists: The UN ranking list is sourced from the United Nations World Population Prospects. Figures are ...
Inbreeding is also used to reveal deleterious recessive alleles, which can then be eliminated through assortative breeding or through culling. In plant breeding, inbred lines are used as stocks for the creation of hybrid lines to make use of the effects of heterosis. Inbreeding in plants also occurs naturally in the form of self-pollination.
Sex ratio by country for the population below age 15. Blue represents more boys, red more girls than the world average of 1.07 males/female. Sex ratio by country for total population. Blue represents more men and boys, red more women and girls than the world average of 1.01 males/female. Sex ratio by country for the over-65 population.
Country Number of births (2023) India 23,219,489 China 8,899,881 Nigeria 7,509,758 Pakistan 6,882,058 Indonesia 4,482,359 Democratic Republic of the Congo 4,369,683
When a species exist in small populations there is an increased risk of inbreeding and greater susceptibility to loss of diversity due to drift. These populations can benefit greatly from the introduction of unrelated individuals [11] who can increase diversity [16] and reduce the amount of inbreeding, and potentially increase population size. [17]
Most of the gene defects are autosomal recessives, so that if both the mother and father carry the same defect, the chance that their child will have the associated disease is 1 in 4. The molecular genetics of many of these diseases have been determined, enabling genetic testing , prenatal testing , and counseling.
Certain levels of sibling marriage and cousin marriage is prevented by law in some countries, and referred to as consanguinity. A long term pattern of endogamy in a region may increase the risk of repeated cousin marriage during a long period of time, referred to as inbreeding. It may cause additional noise in the DNA autosomal data, giving the ...
The detrimental effects of inbreeding depression are especially prevalent in smaller populations and can therefore be extensive in captive populations. [19] To make these populations the most viable, it is important to monitor and reduce the effects of deleterious allele expression caused by inbreeding depression and to restore genetic ...