If an X-linked recessive trait is present in 4 percent of the males in a population with random mating, what is the frequency of carrier females?
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If an X-linked recessive trait is present in 4 percent of the males in a population with random mating, what is the frequency of carrier females?
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- About 7% of men in a population are red-green colour blind due to a sex-linked recessive gene. Assuming random mating in the population with respect to colour blindness; c) What percentage of men would be colour blind in the next generation?Within a randomly mating population of mammals, the homozygous presence of the recessive allele a causes white spotting in the fur, while the presence of dominant allele A causes solid color. A survey was made and of 137 tagged, 4 were spotted. What is the frequency of the recessive gene, of the dominant allele, and of the heterozygote?In a population of 2000 gaboon vipers a genetic difference with respect to venom lethality exists at a single locus. The two alleles (V & v) display incomplete dominance. The population consists of 100 homozygous recessive, non-venomous vipers; 800 heterozygous, mildly-venomous vipers; and 1100 homozygous dominant, deadly-venomous vipers. What is the actual frequency of the recessive allele in the population? /
- In a certain population of frogs, 120 are green, 60 are brownish-green, and 20 are brown. The allele for brown is denoted GB, and the allele for green is designated GG. These two alleles are incompletely dominant to each other. What is the frequency of genotype GGGG in this population?About 7% of men in a population are red-green colour blind due to a sex-linked recessive gene. Assuming random mating in the population with respect to colour blindness b) What percentage of women would be expected to be heterozygous?Assume for simplicity that height is a discrete characteristic that is affected most strongly by a single locus with two alleles, T and S. Homozygous TT are taller than average, heterozygous TS are of average height, and homozygous SS are shorter than average. a) In the Dutch population, the results of height on fertility in males is an example of? b) Would your answer above change for the Dutch women? c) What about the American men and women? d) Can you provide an explanation for the discrepancies in this phenomenon between the Dutch and American populations?
- Orange coat color in cats is due to an X-linked allele (XO) that iscodominant with the allele for black (X+). When genotypes at the orangelocus were determined for a sample of cats in Minneapolis and St. Paul,Minnesota, the following data were obtained:XOXO females 11XOX+ females 70X+X+ females 94XOY males 36X+Y males 112Calculate the frequencies of the XO and X+ alleles for this population.In Hereford cattle, the phenotypic expression of coat pattern called line-back (a white line down the center of the back, extending almost to the tail) is considered undesirable. The gene which causes line-back is recessive and autosomal. If 7 cows out of 100 cattle express this trait, what is the allele frequency for this trait? If the line-back cows are not included in the mating population (W22=0), how many line-back cows will be found in the next generation? (Assume 100 cows in the next generation.) can u ansewer the second questionA Tibetan individual who is heterozygous for the DISC1 and EPAS1 loci mates and produces offspring with someone from the Han population. If the Chinese individual is heterozygous at the EPAS1 and heterozygous at the DISC1 locus, what are the phenotypic ratios you'd expect in their offspring? 9:3:3:1 1:1:1:1 Based on the data, there are not heterozygous individuals from Tibet or EPAS1. All dominant 3:1
- If the frequency of the "green" form of red-green color blindness (due to an X-linked locus) is 5 percent among males, what fraction of females would be affected? Assuming H-W equilibrium what fraction of females would be heterozygous?If the frequency of the homozygous dominant genotype is 0.49, what is the frequency of the dominant allele?What is the frequency of the heterozygous genotype if the homozygous genotype frequencies are 0.1385 (BB) and 0.5897 (bb)?