1: For eye color in humans, assume that the allele (version of the gene) B (brown) is completely dominant to b (blue). Suppose Alex has brown eyes, but his mother had blues eyes. Suppose Betty has blue eyes. Give the expected and phenotype (what you see), percentages (or ratios) for Alex and Betty’s children.
Brown = B (dominate gene)
Blue = b (recessive gene)
Using the laws of Mendelian of inheritance using complete blending, If Brown is dominate but Betty has Blue eyes then it is assumed that her phenotype is bb added that her parents eye color was not mentioned. Note: that Alex’s mother was. If Alex has Brown eyes and his mother had Blue eyes then it is indicated that Alex will be Heterozygous Allele paired or Bb. The chart (Punnett square), or figure 1 below shows the possible offspring Phenotypes of their
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Give all possible combinations of her Father’s and Mother’s genotypes.
Brown = B
Blue = b
Using complete blending and If Brown is dominate but and the child was born with Brown colored eyes. Giving the idea off question 1, again using the laws of Mendelian inheritance; The Brown eye dominance play truth to the chart or figure 2. The parents would be more Homozygous Brown dominate or BB. The Father would have a dominate Bb and the mother would have Bb dominates, which would explain the reason the girl has brown eyes over the secular Blue eye color as seen in figure 2 regardless of which gene or allele is first: example Bb, bB or BB. QUESTION 2 - Figure 2 BETTY Phenotypes: Brown (B) 3 75% ALEX B b 4 B BB Bb Blue (b) 1 25% b Bb bb 4
3: (a) Suppose skin color in a frog is determined by two alleles: B (blue) and Y (yellow). B and Y show incomplete dominance, where BY heterozygotes are
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.
2. Can the student tell from the blood type if the student is heterozygous or homozygous? Explain. (5 points) Yes, knowing your blood type would
4. Clear wing, Black eye, and Hairless (c, b, and h) are linked, recessive traits carried on
Imagine that you are crossing two plants that are heterozygous for flower color and seed shape. The dominant and recessive alleles for these traits are:
For one of the monohybrid crosses you performed in this Investigation, describe how to use the phenotype ratios to determine
Round seeds (R) are dominant to wrinkled seeds (r), and yellow seeds (Y) are dominant
Based on your results for the female offspring, predict whether color blindness is a dominant or recessive trait. Explain your reasoning.
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.
p2 + 2pq + q2 = 1 ; where ‘p2’ represents the homozygous dominant genotype, ‘2pq’ represents the heterozygous genotype, and ‘q2’ represents the homozygous recessive genotype
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.
This table helps show all the possible genotypes from one set of parents. The table shows that the genotypes purple and starchy are dominant, and the genotypes yellow and sweet are recessive.(stallsmith)
The pairs of alternative traits examined segregated among the progeny of a particular cross, some individuals exhibiting one traits, some the other
C. Differentiate between recessive or dominant? The difference between the two is that it depends on the parents in which one or the both have the gene that is dominant but in which chase if it is recessive it would not get passed down.