1. Gregor Mendel\'s contributions to genetics Aa Aa Gregor Mendel (1822-1884) is
ID: 269351 • Letter: 1
Question
1. Gregor Mendel's contributions to genetics Aa Aa Gregor Mendel (1822-1884) is generally considered to be one of the fathers of modern genetics. Charles Darwin proposed many theories about how species adapt to their environment and change. Which of the following statements about Gregor Mendel's connection to Charles Darwin's work is correct? O Both Darwin and Mendel studied the gradual change in pea plant populations over time. O Mendel discovered the idea of blending inheritance," which Darwin did not agree with. O Neither Darwin nor Mendel believed in the idea of "blending inheritance. O Darwin used the work of Mendel to defend his theory of natural selection O Inga Spence/ Getty Images 2. Alleles As Aa Genes are segments of DNA that code for a specific trait. The exact DNA sequence of a gene might vary between individuals or between homologous chromosomes within an individual. Different possible versions of a gene are called alleles. Alleles of a gene are usually represented by a single letter. Dominant alleles are indicated with a capital letter, and recessive alleles are indicated with a lowercase letter The following letters indicate the pairs of alleles present on a homologous chromosome pair within an individual organism. For each, select whether the individual is homozygous dominant, homozygous recessive, or heterozygous for that gene 90 Homozygous dominant NnExplanation / Answer
Answer 1:
First option is correct, “Both Darwin and Mendel studied the gradual change in Pea plant populations over time.”
Rest options are incorrect.
Explanation:
Mendel studied the inheritance of seven different features in garden peas as his primary model system, and give Law of segregation (only one of the two gene copies present in an organism is distributed to each gamete).
In a letter (1866) to Wallace, Darwin mentioned his hybridization experiments with pea plants and result of obtaining segregating varieties, efficiently disproving his theory of pangenesis with blending inheritance.
Answer 2:
As it is already mentioned above that Dominant allele are indicated with Uppercase letter and recessive are with a lowercase letter. When two copies of allele are same they are either dominant or recessive and when there is two different allele of a gene it is heterozygous.
Accordingly, answer is:
QQ: Homozygous dominant Nn: Heterozygous
jj: Homozygous recessive tt: Homozygous recessive
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.