What does a fixed allele mean?
An allele for which all members of the population under study are homozygous, so that no other alleles for this locus exist in the population.
What does a fixed allele mean quizlet?
What does “a fixed allele” mean? An allele that is the only variant that exists for that gene in all the population. You just studied 134 terms!
What is an allele quizlet?
An allele is an alternative form of a gene (one member of a pair) that is located at a specific position on a specific chromosome. These DNA codings determine distinct traits that can be passed on from parents to offspring.
What statistical rule does genetic drift follow in small and large populations?
What “statistical rule” does genetic drift follow in small and large populations? An allele takes less time to become fixed in a small population than a large one.
What causes fixation of alleles?
Drift causes fixation of alleles through the loss of alleles or genotypes. Drift can lead to the fixation or loss of entire genotypes in clonal (asexual) organisms. Drift leads to an increase in homozygosity for diploid organisms and causes an increase in the inbreeding coefficient.
What happens to the A allele when the A allele is fixed?
When the allelic frequency in a population reaches 1.0, the allele is the only one left in the population, and it becomes fixed for that allele. The other allele is permanently lost. In populations in which an allele has become either fixed or lost, the process of random genetic drift stops at that locus.
What is the sneaker male gambit quizlet?
What is the “sneaker male gambit”? The quiet male cricket “sneaks” past with stealth, disguise, or something else to mate with the female while another male is courting or guarding the female.
What is meant by heterozygote advantage?
A heterozygote advantage describes the case in which the heterozygous genotype has a higher relative fitness than either the homozygous dominant or homozygous recessive genotype. The specific case of heterozygote advantage due to a single locus is known as overdominance.
How does the similar use of DNA explain the evolutionary relationship between all living things?
The different variations in genes. How does the similar use of DNA explain the evolutionary relationship between all living things? All living things make their DNA with the same four nucleotides and they all use DNA the same way. … Each offspring has half of each parents DNA.
What is an allele quizlet Chapter 14?
allele. any of the alternative versions of a gene that produce distinguishable phenotypic traits. Only $35.99/year. dominant allele. a gene that is fully expressed in the phenotype of a heterozygote.
How is an allele described?
An allele is a variant form of a gene. … Genotypes are described as homozygous if there are two identical alleles at a particular locus and as heterozygous if the two alleles differ. Alleles contribute to the organism’s phenotype, which is the outward appearance of the organism. Some alleles are dominant or recessive.
What are different alleles quizlet?
Different alleles are different DNA sequences found at the same locus on homologous chromosomes. In a certain plant, the alleles A, B, and C are completely dominant to the alleles a, b, and c. A plant with the genotype AABbcc will have the same phenotype as a plant with the genotype __________. AaBBcc.
Does Lenski’s research suggest that the ability to feed on citrate was the first mutation that arose in his bacterial population Briefly explain your answer?
Does Lenski’s research suggest that the ability to feed on citrate was the first mutation that arose in his bacterial population? Briefly explain your answer. No, the bacteria probably gained the adaptation to not dying when it was exposed to citrate.