Connected Mcgraw Hill Com Lesson 3
Unlike phenotype, which is only impacted by genotype, genotype is directly inherited from a person's parents. Question: Two heterozygous white (brown fur is recessive) rabbits are crossed. Therefore, a color determined by a recessive allele cannot be expressed when a dominant allele is present. Genotypes: BB, Bb, bb. All offspring are expected to have black fur because all offspring will have at least one dominant allele for black fur which will overpower any allele for brown fur. What percentage of the offspring are expected to have black fur? All Middle School Life Science Resources. Learn the definition of a gene pool and understand how it changes. The answer is 50% BB and 50% Bb, as shown in the punnet square below. The answer is "Both are black. "
The answer is "75% black feet and 25% brown feet" because phenotypes are the physical expression of an allele pair and the dominant allele for black feet will overpower the allele for brown feet. Since both parents had to have homozygous recessive alleles for blue eyes in order to express them, they both must have "tt" for a genotype. The parents' rabbits have the following genotypes: |W||w|.
For which of the following parental genotypes would 100% of offspring be expected to be blue? In a population of rats at a pet store, the allele for black fur is dominant (B) and the allele for brown fur is recessive (b). Phenotypes: 3 white, 1 brown. Try it nowCreate an account. The answer is 100% long necks. 75% black feet and 25% brown feet. The following punnet square shows the results. Seventy-five... See full answer below. Our experts can answer your tough homework and study a question Ask a question. The sum of a person's attributes or observable characteristics is their phenotype. Polycystic Kidney Disease (PKD) is a disease that can cause kidney failure. A rat with the genotype BB is crossed with a rat with the genotype Bb. Homozygous recessive and heterozygous.
Learn more about this topic: fromChapter 17 / Lesson 24. What are the phenotypes of the offspring from the cross shown in the punnet square above? The allele for longer necks in giraffes is dominant to the allele for shorter necks. Learn more about punnett square, here: #SPJ2. One is black and one is brown. In poodles, the allele for black fur (B) is dominant to the gene for brown fur (b). C. List probabilities of all possible genotypes. A homozygous dominant crossed with a homozygous recessive parent is shown below.
Dominant alleles are represented by capital letters and recessive alleles are represented by lowercase letters. Biologists use the figure to calculate the likelihood that a child will have a specific genotype. What percentage of chromosomes does each puppy share with its mother? The parents genotypes from this cross are ______. A person's genotype is made up of all the alleles they have for a certain gene. Find how many gene pools there are and discover their various examples. What are the resulting percentages of genotypes of a cross between a homozygous dominant parent and a heterozygous parent? Color Expression: Animals have different colors.
The phrase "homozygous dominant" means the genotype of one parent is BB while "heterozygous" is a genotype of Bb. Brown fur is dominant to white fur in a species of rabbit and is represented with the alleles "B" and "b".