Option C is the basic definition of a species. Can you think of some examples of plants or animals that satisfy A, B, or C that are not the same species?
Answer:
To reach and fertilize an egg, sperm must move — wriggling and swimming through a woman's cervix, uterus and fallopian tubes. This is known as motility. You're most likely to be fertile if at least 40% of your sperm are moving.
Explanation:
Answer:
Explanation:
Reset: Central vacuole
Help synthesis of secretory proteins: Endoplasmic reticulum
Detoxification of hydrogen peroxide: Peroxisome
Information center: Nucleus
Pigments in flowers: Chromoplast
Storage of hydrolase: Lysosome
Synthesis of complex polysaccharides: Golgi complex
Cell shape and movement of organelles: Cytoskeleton
Protein synthesis: Ribosome
Ribosome production: Nucleolus
Photosynthesis: Chloroplast
Turgor pressure: Plasma membrane
Steroid synthesis: Mitochondrion and endoplasmic reticulum
ATP synthesis: Mitochondrion
Boundary of the cell support and regulation of cell properties: Extracellular membrane
Answer:
The correct answer would be -
1- YR, Yr, yR and yr.
2. Yr, yR
3. YR, yr
4. YR, Yr, yR & yr
Explanation:
A mature male or female haploid germ cell that fuses with another gamete of the opposite sex during the process of fertilization to make a zygote in sexual reproduction.
The law of Independent Assortment presented by Mendel says that alleles for different traits are passed and assort independently of one another in the gametes.
1. If Y and R on different chromosomes then they will produce four gametes and assort independently - YR, Yr, yR & yr.
2) If Y and R on the same chromosomes and no crossing over occurs then they will produce only two gametes as Y and R will not come together - Yr & yR.
3). if dominant Y and recessive r are on the same chromosome, no crossing over then only two gametes will form as Y and r will not assort together - YR & yr.
4). if dominant Y and R are on the same chromosome, 50% crossing over produces 4 types of gametes, YR, Yr, yR & yr.
