In sexual reproduction each parent contributes only one allele to the offspring. This is why meiosis takes diploid cells and makes them haploid. The process meiosis separates the homologous pairs, separating the alleles from each other. Thus, each gamete produced has only one allele for each trait. When the male gamete (sperm) fuses with the female gamete (egg) and fertilization takes place, the resulting zygote has two alleles; one from the father and one from the mother.
Yes. Remember that a heterozygote can produce two types of gametes. In this case, the unknown would produce gametes with the dominant allele A or the recessive allele a. The homozygous recessive would still only produce one kind gamete, with the recessive a allele. Therefore, we expect to see only two genotypes in the F1, Aa and aa, in equal proportions.
No, only diploid organisms can be heterozygous.
They will produce gametes that are also homozygous.
A homozygous recessive individual (ss) carries two copies of the recessive allele and does not possess a dominant allele. Therefore, when this individual produces gametes, all gametes will carry only the recessive allele (s). Consequently, the probability of a homozygous recessive individual producing a gamete with a dominant allele is 0%.
Mendel's Law of Segregation states that a diploid organism carries two alleles for each gene, but only passes on one allele to each offspring. This process ensures genetic diversity and the random assortment of alleles into gametes.
Gametes have one allele per trait, as they are haploid cells with half the normal number of chromosomes. Organisms are typically diploid and have two alleles per trait, one from each parent. Each gamete carries only one allele which then combines during fertilization to restore the diploid number of chromosomes in the offspring.
This is known as Mendel's law of segregation, where alleles of a gene separate during the formation of gametes, ensuring that each gamete carries only one allele. This process results in genetic variation in offspring due to the random assortment of alleles.
The allele that causes Huntington's disease is dominant. This means that there only needs to be one present in the gene for it to show in the person's phenotype.
The genotype of the organism must be tt, because sex cells (gametes) only carry one allele each. When gametes carrying the same allele combine during fertilization, the resulting genotype is homozygous for that allele. In this case, if all sex cells have the t allele, the organism's genotype is tt.
The Law of Segregation, proposed by Gregor Mendel, states that each individual organism receives one allele for a particular trait from each parent. This process occurs during the formation of gametes, ensuring genetic diversity in offspring.
Mendel's law of segregation states that only one allele for each gene is passed into an organism's gametes. This means that each parent contributes one allele for a particular trait to their offspring.
the allele causes a certain type of protein to form-apex