1. In these varieties, the singleness allele is closely linked to a pollen-lethal gene . 2. How has such a lethal gene survived the throes of evolution? 3. Mice that are homozygous for the agouti yellow allele have the lethal gene . 4. To prevent lethal gene dosage problems, one of these chromosomes is inactivated following fertilization. 5. Both ear-tufts and rumplessness are caused by lethal genes , so not all birds display these traits. 6. This lethal gene has a molecular on and off switch, allowing these RIDL insects to be reared. 7. Lethal genes cause death in an organism, and RIDl genes only kill young insects, usually larvae or pupae.8. The homologous mouse L7rn6 gene encodes a protein called "'lethal gene on chromosome 7 Rinchik 6 " '. 9. A lethal equivalent is the number of deleterious genes per haploid genome whose cumulative effect is the equivalent of one lethal gene . 10. The roan / Dalmatian factor, sometimes called the " lethal white gene " or simply " lethal gene ", is an incomplete dominant.