The male fruit fly has an XY profile of the sex chromosomes, and the female has an XX profile of the sex chromosomes.
If a male is white-eyed, then it must have a white recessive allele on his only X chromosome and the red eyed female can be homozygous (having two dominant red eye alleles) or heterozygous (having both a dominant and a recessive allele).
If the female is homozygous then all of the offspring will be red-eyed, and if she's heterozygous then half of the offspring will be white eyed. (see the table provided below)
Answer:
In molecules of RNA, uracil takes the place of the DNA base thymine . 4. Build: Continue building the strand of mRNA until you have used all of the RNA nucleotides. ... Every group of three bases of mRNA is called a codon .
Answer:
Evolution is a process that results in changes in the genetic content of a population over time. ... Microevolutionary processes are changes in allele frequencies in a population over time. Three main mechanisms cause allele frequency change: natural selection, genetic drift, and gene flow.
Without predators in an ecosystem, the ecosystem would be dominated by consumers. more consumers in an ecosystem would lead to eating more producers. predators keep an ecosystem in check, to make sure that there isn't overpopulation. hope this helps!