This diagram represents what type of inheritance pattern?

Exceptions to Mendels Laws BSC109 Biology I
Responses

incomplete dominance
incomplete dominance

sex-linked inheritance
sex-linked inheritance

complete dominance
complete dominance

codominance

7 answers

To determine the type of inheritance pattern represented in the diagram you are referring to, specific characteristics of the inheritance pattern need to be identified. Here’s a brief overview of each option:

  1. Incomplete Dominance: This occurs when the phenotype of the heterozygote is intermediate between the phenotypes of the two homozygotes. For example, if a red flower (RR) and a white flower (WW) produce pink flowers (RW), this is incomplete dominance.

  2. Sex-Linked Inheritance: This pattern is characterized by traits that are associated with genes located on sex chromosomes (X or Y). For example, color blindness is an X-linked trait.

  3. Complete Dominance: This pattern occurs when the phenotype of the heterozygote is the same as the phenotype of one of the homozygotes. For instance, if a dominant allele (R) masks the effect of a recessive allele (r), then the presence of at least one dominant allele will express the dominant trait.

  4. Codominance: This occurs when both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive, like AB blood type where both A and B alleles are expressed.

Without viewing the diagram, it is impossible to definitively identify which inheritance pattern is represented. If you can describe the main features of the diagram or provide additional information, I can help you identify the inheritance pattern more accurately.

Phenotype- Red pink White
Genotype- RR Rr rr

Based on the information you provided:

  • Phenotypes:

    • Red
    • Pink
    • White
  • Genotypes:

    • Red (RR)
    • Pink (Rr)
    • White (rr)

This scenario shows incomplete dominance. In incomplete dominance, the heterozygote (Rr) exhibits a phenotype that is intermediate between the two homozygous phenotypes (RR and rr). In this case, the red flower (RR) and the white flower (rr) produce pink flowers (Rr), which is characteristic of incomplete dominance.

So, the correct answer is incomplete dominance.

DNA is composed of two chains with nitrogenous bases that are
complementary to one another. If a portion of a DNA strand reads
ATCCGGAAT, then what would be the complement to this portion of DNA?
Responses

ATCCGGAAT
ATCCGGAAT

ATGGCCAAT
ATGGCCAAT

TAGGCCTTA
TAGGCCTTA

TACGGCTTA

To determine the complementary DNA strand, we need to replace each nitrogenous base with its complementary base pair according to the following pairing rules:

  • Adenine (A) pairs with Thymine (T)
  • Thymine (T) pairs with Adenine (A)
  • Cytosine (C) pairs with Guanine (G)
  • Guanine (G) pairs with Cytosine (C)

Given the DNA strand you provided: ATCCGGAAT

We will replace each base with its complement:

  • A (Adenine) pairs with T (Thymine)
  • T (Thymine) pairs with A (Adenine)
  • C (Cytosine) pairs with G (Guanine)
  • C (Cytosine) pairs with G (Guanine)
  • G (Guanine) pairs with C (Cytosine)
  • G (Guanine) pairs with C (Cytosine)
  • A (Adenine) pairs with T (Thymine)
  • A (Adenine) pairs with T (Thymine)
  • T (Thymine) pairs with A (Adenine)

So the complementary strand would be: TAGGCCTTA

Thus, the correct response from the options provided is TAGGCCTTA.

During meiosis, crossing-over may occur. Crossing-over usually results in
Responses

variation within the species.
variation within the species.

the development of identical offspring.
the development of identical offspring.

overproduction of gametes.
overproduction of gametes.

fertilization and development.

Crossing-over is a process that occurs during prophase I of meiosis when homologous chromosomes exchange segments of genetic material. This process leads to genetic recombination, resulting in new combinations of alleles in the resulting gametes.

Therefore, the result of crossing-over is:

Variation within the species.

Crossing-over increases genetic diversity among offspring, which is an important factor in evolution and adaptation. So, the correct response is:

Variation within the species.