Question

Directions:

1. Flip a coin two times for each trait investigated in the worksheet. If the coin lands on heads, record a capital letter; if the coin lands on tails, record a lowercase letter.
2. The capital letters will represent a dominant allele; the lowercase letters will represent a recessive allele.
3. Check the Genotype/Phenotype Key to determine what trait your individual will inherit.
We did the first one for you as an example. Our student flipped the coin and it landed on tails; therefore, he recorded a lowercase “f” in the chart. On the next flip, the coin landed on heads; therefore, he recorded a capital “F” in the chart. When he consulted the genotype/ phenotype key, he found that freckles were a dominant trait, which means that the individual will have freckles.
Continue flipping the coin to fill in the chart. When you have completed the chart, use the key to determine the phenotype of the individual. Be careful not to miss the question at the end of the chart. When you are done, please attach your chart to the assessment 5.06 Genotypes and Phenotypes.



Trait Flip the coin to determine what trait the child will receive from his or her mother Flip the coin to determine what trait the child will receive from his or her father Combine the letters placing the capital letter first Consult the genotype/phenotype key and record what trait will be exhibited (the individual’s phenotype)
Freckles, present or absent – use the letter F or f
f
F
Ff
Freckles present
Widow’s peak, present or absent – use the letter W or w
Earlobes, attached or detached – use the letter E or e
Face shape, round or square – use the letter R or r
Cleft chin, present or absent –use the letter C or c
Bushy eyebrows or fine eyebrows – use the letter B or b


Question: This activity describes the dominant and recessive pattern of inheritance. Identify and describe two other patterns of inheritance listed in the lesson.

Answer 1

Two non-dominant/recessive patterns of inheritance are incomplete dominance, where a heterozygous genotype results in a blended phenotype, and codominance, where both alleles are fully expressed resulting in a phenotype showing both traits.

Step-by-step explanation:

Aside from the dominant and recessive pattern of inheritance, two other patterns of inheritance mentioned in the lesson are incomplete dominance and codominance.

Incomplete dominance is a pattern where the heterozygous genotype results in a phenotype that is a blend of the two alleles. For instance, in the case of flower color, if red (RR) is crossed with white (rr) and the result is pink (Rr), pink is the phenotype showing incomplete dominance.

Codominance is when both alleles in the heterozygous state are fully expressed, resulting in offspring with a phenotype that shows both traits simultaneously. A classic example of this is the AB blood type in humans, where alleles A (IA) and B (IB) are codominant, resulting in blood type AB (IAIB).

Answer 2

Two other patterns of inheritance include natural eye color and hair color.