RrYy x rrYy
Gametes: RY, Ry, rY, ry and rY, ry, rY, ry
Upon crossing these gametes:
- RrYY, RrYy, RrYY, RrYy
- RrYy, Rryy, RrYy, Rryy
- rrYY, rrYy, rrYY, rrYy
- rrYy, rryy, rrYy, rryy
- A dihybrid cross is made up of two people who have two features that are regulated by two different genes. Gregor Mendel's observation of pea plants that were either round or wrinkled, yellow or green, gave rise to the concept of a dihybrid cross.
- When two heterozygous people are crossed, the offspring's genotype and phenotypic ratios will be predictable. Crossing heterozygous parents would result in an estimated phenotypic ratio of 9:3:3:1.
- Deviations from these predicted ratios may point to a relationship between the two features or to a non-Mendelian method of inheritance for one or both of the traits.
- The genotypes of a specific cross or breeding experiment are predicted using the Punnett square, a square diagram.
16 different genotypes will be formed.
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Answer: Tomato plant is a multicellular organism.
Explanation: A multicellular is a organism composed by many types of cells or cell lines. A tomato plant is composed not only by million of cells but by many types of them in the different tissues and organs, for example, leaves have epidermic cells that protect them, stomata cells for gas exchange, chlorenchyme cells that have chloroplasts to do photosynthesis, phloem and xylem cells to transport fluids, etc.
Answer:
Option b.) propulsion: physical breakdown of ingested food in the GI tract
Explanation:
The physical breakdown of ingested food in the GI tract is called Mechanical digestion, and it breaks the food into smaller parts, to have more surface area for digestion, also to increase mobility. An example of Propulsion is the act of swallowing, which objective is to move the food through the digestive tract.
The correct order of functions is: Ingestion, Propulsion, Mechanical digestion, chemical digestion and Absorption.
The anatomical structure of bird wings and butterfly wings when compared to each other are found to be <u>Analogous.</u>
Explanation:
Analogous structures are structures that share functions and may look alike because both adapted in the same way to the same conditions in the environment. However, they may have a distant evolutionary relationship. Another example is the wings of a bat and wings of a bird. These two features are analogous because remember that a bat is a mammal while a bird is an ave. Homologous structures share close evolutionary relationship even though they may appear different.
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