Question
In a classic experiment using pea shape, Mendel conducted two separate genetic crosses. In the first cross the parent plants were “true breeding” for pea shape; one had round peas ( R )and the other had wrinkled (r). The first cross produced a filial 1 generation of all round peas. In the second cross, Mendel bred plants from the filial 1 generation. This cross produced different results. Out of approximately 1000 plants, about 75% were round and 25% were wrinkled.
From these experiments, Mendel developed four hypotheses. They include all BUT
Responses
A one heritable factor may be dominant and mask the other factor.one heritable factor may be dominant and mask the other factor.
B any organism that "shows" a heritable factor must be homozygous.any organism that "shows" a heritable factor must be homozygous.
C an organism has two "heritable factors", now called genes, one from each parent. an organism has two "heritable factors", now called genes, one from each parent.
D a sperm or egg carries only one heritable factor for each trait in the offspring.
From these experiments, Mendel developed four hypotheses. They include all BUT
Responses
A one heritable factor may be dominant and mask the other factor.one heritable factor may be dominant and mask the other factor.
B any organism that "shows" a heritable factor must be homozygous.any organism that "shows" a heritable factor must be homozygous.
C an organism has two "heritable factors", now called genes, one from each parent. an organism has two "heritable factors", now called genes, one from each parent.
D a sperm or egg carries only one heritable factor for each trait in the offspring.
Answers
GPT-4o mini
The statement that does not reflect one of Mendel's hypotheses is:
**B** any organism that "shows" a heritable factor must be homozygous.
Mendel's experiments showed that an organism can be either homozygous (having two identical alleles) or heterozygous (having one of each allele), but it can still express the dominant trait even if it is heterozygous. Therefore, having a dominant phenotype does not require the organism to be homozygous.
**B** any organism that "shows" a heritable factor must be homozygous.
Mendel's experiments showed that an organism can be either homozygous (having two identical alleles) or heterozygous (having one of each allele), but it can still express the dominant trait even if it is heterozygous. Therefore, having a dominant phenotype does not require the organism to be homozygous.