General Questionnaire

The total number of Pago Fuagans that are carriers of the (g) allele and phenotypically normal =

Figure 4. This graph depicts the average allele frequency of male cichlid fish when a mutation that goes from recessive to dominant arises within the population at a rate of 0.001. The average value over five trials is shown to be 0.318.

parent carried the b allele. The F1 offspring of such a cross would be Bb, and

2. At the end of meiosis, how many haploid cells have been formed from the original cell?

---If given traits and parents, be able to use a Punnett square or patterns to predict the probability of offspring for a given cross and express it as a fraction, percent, or ratio.---

Suppose the feather color of a bird is controlled by two alleles, D and d. The D allele results in dark feathers, while the d allele results in lighter feathers.

Explain why crossing over is important in meiosis. (3 points) Parents cell use it to pass genes off to their children cells.

Apply your understanding of how alleles assort and combine during reproduction to evaluate a scenario involving a monohybrid cross.

(e) The largest DNA fragment on the gel belongs to the mother of Couple B and

Now you have determined some facts about the grounded allele and the trait that it causes. Given what you know, do you expect the mutant F1 flies to be homozygous or heterozygous for the allele that causes the grounded trait? According to your reasoning, if you mated two mutant F1 flies, what percentage of flies would you expect to be wild type versus mutant in the F2 progeny? Draw a Punnett square of this cross to justify your answer.

This lab had 2 exercises. Exercise 9.1 involved observing pictures of 60 F2 offspring and recording the phenotypes for 6 different traits. Exercise 9.2 required us to perform the “chi-square test” to determine whether the data we collected matches the standard Mendelian ratio.

Biological variations include physical traits. These traits include stature, skin, and hair color; genetic predispositions to disease; susceptibility to illness;

You are also provided with a heterozygous female, and a homozygous recessive male for a genetic cross. In this particular female, all the dominant alleles are on one chromosome, and the recessive counterparts are on the other homologous chromosome. Due to a chromosomal condition, in the female no recombination occurs between the M and N loci. Normal recombination occurs between the L and M loci. Diagram this cross, and show the genotypes and frequencies of all offspring expected from this cross.

Based on your results for the female offspring, predict whether color blindness is a dominant or recessive trait. Explain your reasoning.

If you have the heterozygous pair and your spouse has the same heterozygous pair then your offspring will either have the homozygous dominant pair, the heterozygous pair or the homozygous recessive pair. If you have the homozygous recessive pair and your spouse has the same homozygous recessive pair then your offspring will all have the homozygous recessive pair. “For example, blue eyes are determined by a recessive allele and brown eyes by a dominant one, which means that a child conceived by a blue-eyed person and a brown-eyed person will usually have brown eyes. ‘Usually’ is accurate, because sometimes a brown-eyed person is a carrier of the blue-eyed gene. In that case, in blue-eye/ brown-eye couple, every child will have at least one blue-eye gene (from the blue-eyed parent) and has a 50/50 chance of having another blue-eye gene (from the other parent).” (Berger, 2014, p. 56). “If two brown-eyed parents both carry the blue-eye gene, they have one chance in four of having a blue-eyed child.” (Berger, 2014, p.